Error codes for Trane gas furnaces
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- Опубликовано: 28 авг 2024
- This one covers the IFC error codes for most Trane furnaces. This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. If you have suggestions or comments they are welcome.
If you are a homeowner looking to repair your own appliance, understand that the voltages can be lethal, the fuels are highly flammable and high pressures are used. Know your limits.
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New home owner with a gas furnace. Seen the continuous red blinking light, thought it was a problem. I seen in the beginning of your video that it's supposed to blink slow then blink fast when heat is on. I almost paid addcox 100 for service call. Thank you !!
I had the exact same question that he answered at the beginning of this video! Originally , it was blinking 3 lights but after cleaning the vents , and the furnace worked , I thought I still had a problem because it was continuously blinking red. So, that's normal and working, I guess! I was expecting it to not light up at all. anymore .
Super helpful video, had no idea what the flashing lights meant, and with this it made figuring out so much easier!
This is SO much more helpful than the Trane website. Thank you so much.
Sometimes I think all they want to do is sell furnaces. Glad it helped.
GFM
It honestly feels that way.
They want you to call repair man not to fix it yourself. that's how they make money. The manufacture sell you a unit then the repairman installs or fixes it. Everyone makes money but you.
Thanks this has helped so much, I never noticed the blinking red light before.
Thank you. This video allowed my husband to identify the problem and fix it. Seems there was ice built up in our pipes on the outside of the house. Thanks again!
Welcome
GFM
Terrific Information here - I had 4 Blinks - It was a Clogged Filter - Fairly new, but Clogged with White Dust from Humidifier - Simple & Inexpensive Fix - Thanks!
Welcome
GFM
But Bob, you fan motor came on right ? My door is off and fan motor is not started after gas ignites and 45 second counts down... just seeking wisdom and a running furnace...
This video is super helpful! I've no idea if my furnace's status light could be treated as "slowly flashing" lol
Thanks for the video. I was able to understand the LED error codes and fix it. I had a 3 blink error code. Water to outlet wad logged. Once it was fixed, it started working like magic!!!
Very informative thank you 👍
A breakdown for the layman, thank you.
Thank you! You just saved me a service call. I really appreciate the way you ran through these issues.
Welcome
GFM
I have never encountered this before either. Have found out on some forums that this 5 code is more or less a catch all for things (glitches ?) that the board can't read. The solution, if the code continues is to replace the board. Of course all the other components of the furnace need to be checked and OK'd for function. Then if the code keeps showing up, replace the board. The code on this furnace in question would show whether the gas valve was on open or off at the valve knob. The things I read said to replace the board. The people who asked about this, did replace the board, and they said that took care of the problem.
This was literally the reason I looked at this video thank you this is helpful I'm not sure if it's the problem yet but I'll check into it seems to be an intermittent issue if I kill the breaker on my furnace for a minute and then turn it back on and it runs good for a day or two and then won't ignite and has a five light code
Thank you. This was very helpful. I was able to solve my issue using this video to better understand the codes.
Welcome
GFM
I really enjoy and learn so much from your channel. You are a great tutor!
My Trane XE80 gave 5 flash code tonight, and the code did not change even after the flame rod was carefully cleaned. I jumped W and R at the thermostat, and the inducer fan ran for 3 seconds and then the blower fan came and stayed on. That was all the furnace gave. I checked other components (pressure switch, roll-out limit, high-temp limit, and ignitor) and they seemed to be alright. If the gas valve was stuck open, should I smell gas when the inducer fan was running? Should I manually switch off the gas valve and try it again? if the code persists, does it mean that I have a bad board? Your professional input would be greatly appreciated.
An update: problem solved by tighten the ground screw. so the problem were both dirty flame rod and loose ground. The board was fine. I still don't know why the error code was 5 flashing.
I've had a code 5 numerous times on my old piece of crap Trane XE80. Every time I fixed it by taking sandpaper to the flame sensor rod. This has now happened a few times so tonight I finally broke down and ordered a new flame senor for $8. Hopefully I won't have to break out the sandpaper for a long time!
If your furnace is located in a laundry room, you are drawing chemicals from the washing machine into the flame. That will do it. Also, do not be aggressive with the sandpaper.
GFM
Does your fan run constantly when this happens? Are you saying I need to clean where the flames come out? I changed the board in mine thinking it was bad and it worked all winter after doing that but recently I noticed the blink came back. Any advice would be appreciated!
@@noimnotastrangerthingsfan5832 After I replaced the sensor rod I stopped having problems. It's definitely worth the small amount of money. And yes, the fan would run continuously sometimes when the sensor rod was acting up. Same thing with the igniter too if I remember right.
So far on my Trane I've replaced the sensor rod, the igniter, the mainboard, the blower, and the draft inducer motor. It's now been trouble free for 2 years.
Thanks for the info my man
Super helpful. Really appreciate the video.
Great video, Very helpful!!!!!!!!!!!
I got the water condenser box , this is a bull shot design. Serviced every year since installed 5yrs ago.
Thanks i got worried about continuous red led light all it as was doing was calling for heat as you said in this viedo.. and then it went to slow steady red when the heat came on then cycle every 6 minutes on and of is that regular I have it set to 71° and out side it's about 30° in philly
Great video
Great video. Thanks for the help
Welcome
GFM
I'm getting the pressure sensor error on my Trane XB80, but I've tested the switch with a multimeter and it is functioning properly (conpleting the circuit when the inducer motor kicks on), which not only tells me the switch itself is working, but also that there is no blockage in the vent pipe.
What else might cause this error?
Thank you so much!
Like others said, very informative video!! Thank you ::thumbs up::
summer time AC issue. furnace was blinking the single slow one blink. hard wired thermostat is blank. ac won't turn on. drain pan dry. clear vue pump blinking blue meaning sensors are working. something is causing emergency shut off...
Ummm what’s the flame sensing with gas valve off? 5 blinks?
Hey, I'm getting solid red on a XV95 and the blower stopped working, possible fuse or more likely the board itself is toast? Thanks
This was pretty helpful. Thanks for the video
I have a trane xv80 that blinks twice. Its a code for external lockout. Sometimes my furnace runs fine. And some other times, it wont heat. It blows cold air. I already replaced the flame sensor and the ignitor. What do you think is the problem. Thank you!
Did you ever figure it out? I'm having this exact issue right now. Thanks
I have trane xc 95m. Power switch to blower accidentally got turned off for few hours. Think maybe ac froze? I turned power switch back on to the furnace and getting 10 blinking red lights which means communication error?? Please advise,
What would 7 seven blinks indicate?
Awesome !! Thank you so much !
Welcome
GFM
Thank you!
Hi GFM... Well Done & Informative! This might be a duplicate, I didn't realize I was on my wifes account earlier.
We have 5 blinks on XE90, White Rodgers #50A50-474, indicates "Flame Sensed with Gas Valve Off". Symptoms are... After a power cycle... will show slow blink, then fast blink when heat is called, furnace cycles, fires and runs fine. Once the call for heat ends, the flame stops, and the fan keeps running indefinitely, then the 5 blink error appears... If called for heat again... no joy, it just stays with the 5 blinks and the fan running until the unit is power cycled again. Same thing over and over. We have a new flame sensor installed. And I've checked the continuity on the high limit / fused link circuit as closed. Do you have any additional troubleshooting suggestions before replacing the control board? Of course any help is greatly appreciated.
PS - this was a used furnace (from a friend), who indicated it worked fine. I did have an hvac crew install it a few months ago along with an AC unit, but the system was never put into use until now. Could a misconfiguration of thermostat wiring cause this problem? The HVAC crew did wiring to the AC unit and furnace, and then ran a 6 wire cable to where the normal thermostat will ultimately be located (however there is no thermostat there). All I did was wire in a basic heat only thermostat on white & red terminals.
The one other issue you may have is reversed polarity or a bad ground. Usually the unit will not operate with reversed polarity, but it could be the problem.
GFM
super helpful thank you grayfurnaceman
+Megan Daily Welcome
GFM
If the led light is off all time, what the problem. Tnk for you
Can that indicate the pc board being bad with the rapid red light blinking continuously?
Rapid blinking means a call for heat.
GFM
good one, thank you...
good info
Thanks for posting this.
+icomlw Welcome
GFM
at first this ignition worked than found a bad vacuum/pressure switch and replaced it. Its a Trane XB80 ( older ) f.a.g.heater now flashing (4) blink code... say high limit failure but high limit and thermostats have continuity. ( no water vents ). Inducer motor comes on and sometimes the main blower but no ignition or flame. What do you think/ Thank you
Are the rollouts closed? Located above the burners.
GFM
yes , hi limit and roll outs are closed
@@grayfurnaceman
yes
@@grayfurnaceman
Hey Bud, so I get a slow flash continuously and when I set the thermostat, I get nothing. Hopefully you re on RUclips right now. Thanks
The light goes out when you call for heat?
GFM
have a trane, american standard freedom 80 two stage, model #AUD2B080A9362AB. Keep getting 2 blink code. Cleaned the flame sensor, same issue, replaced it with a new one, same issue. After a reset it usually turns on and gives heat for a little while, anywhere from 5 mins to a couple of hours, then it starts blowing cool air and the temps start to drop in the house. I've watched as it cycles on before throwing the 2 blink code. After a reset, when the call for heat kicks in it give the normal rapid blink, It gets ignition, the flames light up, then it shuts down and restarts this cycle about a total of 10 times before, there have been a couple of times when i hear the clicks right before the burners flame kicks in but they don't actually flame up. after this cycle of about 10 tries it then begins to blink twice again. Any ideas? It does have a new air filter, replaced about 2 months ago.
Hi, what if there is a continuous red light with no blinking on my trane xr80 furnace? Nothing happens when I turn it on. Just 1 click and nothing. I replaced the ignitor and cleaned the flame sensor. New batteries in thermostat.
In most of these controls, that means the control has failed. Check either the cover on the control or the inside where the diagram is.
GFM
Hi There. Just had the Pressure Switch replaced. I remember things working in a different order. I used to have the vent fan stay on after the furnace and blower turned off ( I could swear it!), but now it seems I have regular blink, followed by vent fan turning on, then fast blink, heat turns on then eventually blower runs and it stays at that fast blink until the heat turns off, vent fan turns off, then blower remains for a minute and turns off, now back to slow blink. Does this sound right? Was I crazy thinking it was the vent fan that used to stay on for a minute after the cycle and not the blower?
Yes, you were crazy lol.
Sometimes the vent fan may continue for a few seconds after the burners shut off, but never after the circulating fan.
GFM
Thanks. You’re the best.
Grayfurnaceman, I have a 12 blink code, fast. Blinking non-stop, during heating and cooling modes. Last year service said we need a new board soon. Haven't had any problem with the unit, heat and cools fine. Home inspection tomorrow, what should I expect?
Normal is slow blink. Call for heat or cool is fast blink. Sounds normal to me.
GFM
Mine did this, new board brought it back to life. Now, two years later, I get a 4 blink error and fan motor and module are new won't start, they were on AC, but switch to Heat and they wont' come on. I replaced the fan board and that allows the system to start up to high temp (4 blinks).....supposedly the white rogers 50A51 507 is replaced by trane kit 09370.
HELLO I HAVE THE SAME MODEL TRANE 95,my red light dont stop blinking, i have a few pipes freezing, a noise every time the fan on,and my air conditioning is not working, so my home now has 76 on the thermostat, but i set it to 71..can you help me..and this is starter happens the other day is a lot of rain and little hails,from that day starts the noise and them not working..thanks
The light should blink slowly indicating power but no call for cool. It will be blinking fast when there is a call for heat. The noise could be a failure of the fan motor or the blower itself. I am assuming the outdoor unit works normally.
GFM
Hello furnace man.. I get the Open Temperature Limit Circuit (4 Flashes RED)
I need to check the filter you said, and the blower Wheel, ETC also if there are filters On the register can that also cause it too..
There should be no filters on the register if there is one at the furnace. You could also have a rollout switch open. If it is, you could have a failed heat exchanger.
GFM
I have a solid red light nothing happens. Hoping its not the board itself
Does the furnace beep? I’m thinking mine is beeping at night and the red light is blinking constantly. What do u think it is? Thx
A slow blink is normal if there is no code. Some furnaces will beep if the filter needs to be changed.
GFM
I'm having a problem with my Trane Furnace the exhaust fan is continuously working even when the the furnace has stopped and the red light is continuously blinking what do i do ??
I would first try a shutdown and reboot. If you still have a fast blink that has no code, your board may have failed. The fast blink indicates a call for heat. This is applicable to furnaces made in the last 30 years. If your furnace is older, you may have ignition failure. If so, you can send me the model # of the control and I may be able to help.
GFM
Thanks man :)
Wow, thank you so much for this video! It helps! a lot! Also if you could tell me why my furnace does this. My furnace blinks normally when its not blowing air and when it is...... but everynow and then the blinker will fast blink when the furnace is blowing heat.
TheHmongol The only thing I can think of is when the furnace is calling for heat, it fast blinks. When the call is over, even if the fan is still blowing, it will slow blink.
GFM
Thanks. I have a furnace that is been working intermittent... at first I got the pressure sw codes... I kind of “smack it” w a little piece of wood, and the furnace kick right back in.. then it shoot off... then after a few times this happening, I start having the following codes. I had the system lock out code and like after doing the same and cycle the system, I had the pressure sw code... is currently not working at all.. an is still cold here.. any ideas what that can be?? Thanks!
I would be looking for water in the pressure switch and its tubing. If it is a 90%, be sure the condensate drain is clear. Check the venting to be sure it is clear. Could also be just a failing pressure switch.
GFM
grayfurnaceman thanks! I'll be checking those out tomorrow morning... as soon I get home.
grayfurnaceman it’s a 2stage, 80%.. trane XL80.. I check the tunes, no water, did Clem them up and clean the back were they mounted to. The igniter glows, and it’s seems gas isn’t going to from the regulator to the flamers... witch is wiered.. cuz it was all working before.. wn I tap the pressure sw a bit.. but that was before....
Now it goes straight to the 2 blinking red Lts...” “ System locked out ( No flame\ check line polarity )”
Any thoughts...
I would check incoming power for reversed polarity.
GFM
grayfurnaceman ... is kind of weird because nobody has mess with the electric on the furnace... I read in another place that he controls box may be bad... giving wrong reading and causing the code...
Thanks!
+C Squared Welcome.
GFM
I have a trane furnace like this. What would make the fan constantly run? Even when it is turned off at the thermostat. Only way to power it off is to turn it off at the breaker. It didnt use to do this. Any help is appreciated. Thanks.
Usually, the fan runs when there is a flame failure. Is the furnace running normally?
GFM
I have the same situation after a blackout situation in the summer, heating is constantly on unless I manually turn off at breaker.
Any ideas to troubleshoot? Also furnace turns off when I open the cover for control panel
@@sirnightwsafety switch when you remove the cover.
I have the Trane XB80. It's not providing heat. the Code is a rapid flashing light. the ignitor glows bt no gas and not heat. Please help. thanks in advance...
The rapid flashes indicates normal operation. If the flame does not come on, that indicates no gas available or gas valve failure. First, be sure you have gas (see if other gas appliances operate).
GFM
My Trane XE90 was working alright, had a gas service take place at the meter and unit restarted fine. Unit operated normal for two days, now I get 6 lights. It cycles on, ignites, and then immediately off.
How could the polarity change when nothing electrical was disturbed?
Sometimes the ground wire (green) is not tight somewhere. I would check that first.
GFM
grayfurnaceman I appreciate your time and assistance!
hi there i have a trane xp80 with a slow flashing error code i know that means no call for heat how do i fix this.
It means all is well with the furnace, but there is no call for heat.
Possible thermostat problem?
GFM
ok i have a cheap thermostat but i unhooked that wired direct and nothing still so does that mean i need a new box ita a beckett honeywell
@@grayfurnaceman
Is this an oil furnace?
GFM@@user-ed2io1lm3z
yes
@@grayfurnaceman
I have no light at all. Power is good to furnace, however, tank is at 10%. Propane is ordered. Could it be because of low tank?
No light probably means there is no 24 volt power. Control transformer could have failed or the low voltage fuse could have opened.
GFM
If there is power to the control panel but no light is it likely the panel failed?
hi there how can you tell when you need a new sensor board?
Some boards will give a code that indicates it has failed or usually a no light condition with power to the board indicates a failure.
Hello.. I have a 6 flash code on a Trane XR90 furnace, which from what I've found it is a grounding issue. What can I check to proceed to the root of the problem?.. thanks
That is the code for reversed polarity. The ground and hot line may be reversed.
GFM
@@grayfurnaceman thanks.. and how do those lines get reversed?.. it just happens on their own?.. because the unit was working just fine before.. So how do I go about solving the issue?
I came to find out how to get the codes out of this thing. I've got no light at all, yet the furnace comes on and the gas shuts off when it reaches temp, but the fan won't shut off. Even if I turn the thermostat down and switch it off at the thermostat. So I make sure the gas is off and it's cooled a bit and disconnect power to make it stop. I'm trying to figure out if it's the controller, I've already tried to mess with the dip switches which control the time delay on the fan but, no. I'm thinking the controller is bad, as I get no flashing lights at all, or a sensor that is to confirm the temp has cooled enough to shut off the fan is not working. I'm an electrician, not an HVAC guy, but this is simple. I just need to know if the LED light is supposed to be blinking all the time or what? I've got nothing. How do I get the codes out of this thing? How hard is it to replace just the board in the unit? I've found the boards for sale, cheaper than the whole unit. I don't want to buy used. Thanks
First, be sure the fan switch is in the auto position.
The led should blink slowly if there is power. It should blink fast if there is a call for heat. If the fan is the only problem, you could have the fan relay stuck on. For most, that means a new board. I have never come across an led not working when the furnace runs normally. I suppose it could have just failed.
GFM
@@grayfurnaceman Thank You! A call to a local serviceman confirmed what you said, that relay in the controller is sticking. It's probably 30 yrs old, lol. Thank You so Much for Responding! Blessings!
@@WmArthur Glad you got it figured out.
GFM
And... the five lights flashing???
If all lights are flashing at once, I would replace the control.
GFM
The TRANE XR90 is the worst furnace ever made of any brand in the entire world.
Yep, their junk.
Hi my aircon give me Eb code it's a highdway unit
So is 5 blinks the gas valve
5 blinks is a leaking gas valve or a failed control board. If the burners are lit when power is off to the furnace, you have a leaking gas valve.
GFM
What about the 6 flashing red light
That usually means the control has failed.
GFM
We r having problems with our furnace when we turn the heat on it only blows cold air wat could be causing this?
brady toennies Need lots more info. Brand, model, are there any blinking codes?GFM
Ok I will have to get the information tomorrow
Wat about 5 flash?
That is flame sensed with gas valve off. Means stuck gas valve or board failure.
GFM
An explanation of code 5 would be nice.
+ritewayguy That's kind of an odd one that Trane had. It just means that if the gas valve stuck open, the furnace would shut down and turn on the fan. Never seen it happen.
GFM
Well gentlemen, mine is showing 5 flashes today! Any ideas on what to look for? Thanks!! If it helps, my furnace starts up fine, great flame, flame cuts off but blower will not stop running. Thanks again!
Did you figure out the problem? Mine has done the same. I’ve checked switches and even changed the board. It worked the rest of the winter after changing the board but recently there was a cold morning so we turned on the heat. I noticed the fan running constant so when I checked that 5 blink was back again. If there’s anything you can tell me I’d really appreciate it. So tired of worrying about this.
@@noimnotastrangerthingsfan5832 You could go online and look up your model number and see what you can find. I'm not sure right now what the code may be. There should be a list of codes somewhere on one of the door panels. Sorry I can't offer much more right now.
Thanks for the reply my man I’ll get it figured out
What about 6 flashing lights?
It depends on the furnace model.
GFM
thanks gray,
my led is off completely, however I checked the lines coming into the board and they were hot. is it board problem?
Be sure you have 24 volt power. Fuse on the board?
GFM
+grayfurnaceman I checked the transformer and it was not transforming so I replaced it. but the moment I turned it on it fried the transformer so I think I have short circuit somewhere. I don't have a fuse on this board.
I did a couple of videos on finding the short in low voltage. Check my channel. Hope this helps.
GFM
+grayfurnaceman great will do thanks!
My Trane furnace is sending a code 9 which according to the list is "bad ground in igniter circuit. ?? I have looked at everything,, new igniter, cleaned flame sensor, new pressure switch, tested thermostat, put dielectric on contacts, took volt readings to ground and red on the board.. 24 to 28 volts, Low side voltage on transformer is 24V. I am at my wits end as to why this furnace sometimes does not ignite ,, shuts down and the fan continues to run forever with code 9 blinking. Turn the furnace off and on again and it usually does start up and ignite. It may run normal for a couple cycles but then it goes right back to code 9,, fan on and no heat! Arahhhhhhhhhhhhhhgh!!!!! What the heck is going on? Bad gas valve? Bad board? Bad fan relay switch? Furnace is model TUX080C942C3
At this point, I would try the board. No sure diagnosis here (I hate that, makes me feel like a computer repairman), but it is sometimes correct.
GFM
What's the normal pressure for aninduced motor ?
It varies with the model. There are no common numbers here.
GFM
grayfurnaceman then how can I test to make sure that an inducer is creating a proper vacuum ?
You need to know the pressure it will make at. Some of the pressure switches will have it printed on the label. Some do not have this and you will have to find an install or service manual.
GFM
We took off the front panel to vacuum ut the hose that gets plugged, and we get the red light blinking three times. Can you tell me how to fix this
+Annie Morrison If you used vacuum on the hose with it connected to the pressure switch, you probably damaged the diaphragm in the switch. Means a new switch.
GFM
I don't have lights 😓
If your furnace was made in the last 30 years there are probably error code lights. If there is no lights, you probably have no power to the furnace.
GFM
I have only one flash
One slow flash is normal operation, no call for heat. One fast flash means normal, call for heat.
GFM
It didn’t help,mine has 9 blinks
On some newer Trane units, 9 blinks means either you have reversed polarity of the incoming power or the ignitor is open (failed).
GFM
the light for code is not lit. What should I do to debug next?
No lite, check for power to the unit.
GFM
Thanks.
Mine is flashing 6 times...XV95
That means the neutral and the hot leads of the incoming power are reversed. Sometimes will also mean a failed IFC.
GFM
@@grayfurnaceman Ok. I had an issue with my condensation pump failing yesterday, and ended up having to pull the hoses on the p trap. Had ice in the drain line. I'm heating the garage now with a unit heater to that helps. I've read that's an ignitor code as well. Not sure what to think. Never messed with any wiring. But it sure is cold here in Minnesota
What is 5 code
On a Trane furnace, the 5 code means something like a stuck open gas valve. If the burners are not stuck on, the control board has probably failed.
GFM
I have a code long solid flash followed by 3 short flashes...please help
Kinyetta Chambers this is a pressure switch code. Your flue is restricted or the switch is bad.
I have a code for no call for heat I'm lost on what to do for that
I would be looking at the thermostat as the problem here. You can try removing the thermostat and shorting the white and the red wires. If it starts, the thermostat is the problem. Hope this helps.
GFM
Gray furnace man..do I need
To shut off the gas line to clean the thermostat???thank you