Code 20 is "twinning fault" which refers to conflicting thermostat signals, e.g. heating and cooling calls at the same time. In this case, the conflict was being generated within the board itself.
Hey Steve, great diagnostics!! There is a lot of parts changers out there, but actually finding the issue makes you have all your repeat customers. Plus honesty, that’s a big one!!
Maybe use the chrome colored anti static bag, by splitting it open, and draping it over the new circuit board. Keeping future moisture off the connectors.
Nice repair man. Error code 20 "TW" is a Twinning Fault. The furnace control board was thinking that it was set up to twin with another non-compatible furnace, so it wouldn't fire off. Don't see that one everyday. Thanks for the video and stay safe out there.
I wonder if something is holding the twinning signal high or low, causing the fault? Obviously, the microcontroller thinks that the furnace is twinned with another furnace.
Wow, 7 burner tubes ! 140,000 BTU ? There was a dark spot on the lower backside of that main board I believe. What are the negatives with those NEST thermostats? Or limitations?
The first thing I would do is jump 120V AC to that inducer motor eith an extension cord. If it runs id check the vacuum switch, the vacuum port, and the condensate trap. Anybody else see those water traces below the base of this unit? Look right below Steve's drop light.
It does sound like a bad board, especially if it's giving you a twinning fault. It's a single furnace, definitely not twinned. And seeing all that rust and corrosion, it looks like water has been leaking all over it. Probably a previously or current clogged evap drain.
Hate to break it to you, but those blue vinyl gloves won't do anything to prevent ESD damage to boards, and may even increase the chances of it. What you need to be doing is wearing a wrist strap, grounded to the frame of the furnace.
Some agree, he was working on concrete plus touching the sheet metal most of the time so Steve is doing okay on this job. Carpeting would be the environment to be careful but as long as you are touching the cabinet or a pipe etc. prior to handling the board, you are safe. Those wrist straps do work but if you know what you are doing you can prevent ESD without one.
The gloves won't do anything to protect against static discharge. They may even make it worse. What you need is an anti-static wrist strap which you connect to ground.
@@gumbootcloggers8330 Heating systems fail (or are noticed) more often during the winter when the RH is low, even in the basement. If you want to protect against ESD then do it right, it's cheap! That's from a guy who repairs these boards. Your choice as to what you do with that info. There are other things you can do as well but the wrist strap is the simplest.
@@flyer617That board is $85 at the supply house. Is it worth the effort to repair them. When in doubt, swap it out. Charge the customer $125 for diagnostic $225 for labor and sell them the board for $300. Get $750 from the job and forget about the guy that “repairs” the boards.
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
Code 20 is "twinning fault" which refers to conflicting thermostat signals, e.g. heating and cooling calls at the same time. In this case, the conflict was being generated within the board itself.
Jumping TT proved that.
Hey Steve, great diagnostics!! There is a lot of parts changers out there, but actually finding the issue makes you have all your repeat customers. Plus honesty, that’s a big one!!
Amazing service call. We're not worthy, We're not worthy.
Steve you are the best. Keep up the interesting videos.
Steve, you would enjoy a magnetic light when working on furnaces etc!
Good job Steve you always figure it out you and Molly take care
Good call
Steave.
Great video. Great time of year for driving around
Miss Molly sporting her very warm looking outfit is working again.
Maybe use the chrome colored anti static bag, by splitting it open, and draping it over the new circuit board.
Keeping future moisture off the connectors.
Nice repair man. Error code 20 "TW" is a Twinning Fault. The furnace control board was thinking that it was set up to twin with another non-compatible furnace, so it wouldn't fire off. Don't see that one everyday. Thanks for the video and stay safe out there.
What make of furnace was this repair?
Great video. Thank you for sharing
I wonder if something is holding the twinning signal high or low, causing the fault? Obviously, the microcontroller thinks that the furnace is twinned with another furnace.
Been there, done that, shit show for sure. Steve. Great video. Thank you.
hot damn! it works!! Thanks for another one Steve!
Excellent repair
Howdy Steve and Miss Molly
Wow, 7 burner tubes ! 140,000 BTU ? There was a dark spot on the lower backside of that main board I believe.
What are the negatives with those NEST thermostats? Or limitations?
Tell us how your truck has been
Thanks for the reminder to change my own filter! Yeesh!
I wish I had the money to buy you a decent Nitecore headlamp.
Rubber gloves, acting ground 🎃🎃🎃🎃🎃🎃🎃🎃🎃🎃 Happy Halloween Steve 👻👽👹☠️
Thermostat set on cooling 😂🇨🇦. Old vet in this trade!!
What brand of furnace is this?
Rheem
The first thing I would do is jump 120V AC to that inducer motor eith an extension cord. If it runs id check the vacuum switch, the vacuum port, and the condensate trap. Anybody else see those water traces below the base of this unit? Look right below Steve's drop light.
Mom's furnace was built 1980 just changed the blower motor after 44 years no circuit board 😊
wow, nice job!
I love the Old, RELIABLE FURNACES AND A/C SYSTEMS
They definitely don’t make them like they used to.
Steven, get the ole snowblower ready.
Remember when furnaces were bullet proof?
Troubleshooting videos my favorite Steve
It does sound like a bad board, especially if it's giving you a twinning fault. It's a single furnace, definitely not twinned. And seeing all that rust and corrosion, it looks like water has been leaking all over it. Probably a previously or current clogged evap drain.
or air intak don,t have a drip scoop in it
Hi Steve, Will there be anymore cooking videos? I love watching the "Workin Men Cooking" Series
💪🏻😄✌🏼
It would be a good idea to plug the fan directly into 110v. with simple extension cord.
You can test all fans that way.
Hate to break it to you, but those blue vinyl gloves won't do anything to prevent ESD damage to boards, and may even increase the chances of it. What you need to be doing is wearing a wrist strap, grounded to the frame of the furnace.
Agree. And/or touch ground before messing with it if you don't have a wrist strap.
Unless you are shuffling around on carpet in your socks you'll be fine. It's more of a precaution, unless you're building out a computer system.
Some agree, he was working on concrete plus touching the sheet metal most of the time so Steve is doing okay on this job. Carpeting would be the environment to be careful but as long as you are touching the cabinet or a pipe etc. prior to handling the board, you are safe. Those wrist straps do work but if you know what you are doing you can prevent ESD without one.
Nobody gives a shit bro
Blue nitrile gloves are inherently non-conductive. They reduce direct skin contact (a primary source of static).
Hi Steve UK
The gloves won't do anything to protect against static discharge. They may even make it worse. What you need is an anti-static wrist strap which you connect to ground.
I think I see what you are saying. LIke when he handles the board? maybe it's a non issue.. IDK
Basements are usually damp and static not a poblem.
@@gumbootcloggers8330 Heating systems fail (or are noticed) more often during the winter when the RH is low, even in the basement. If you want to protect against ESD then do it right, it's cheap! That's from a guy who repairs these boards. Your choice as to what you do with that info. There are other things you can do as well but the wrist strap is the simplest.
@@flyer617That board is $85 at the supply house. Is it worth the effort to repair them. When in doubt, swap it out. Charge the customer $125 for diagnostic $225 for labor and sell them the board for $300. Get $750 from the job and forget about the guy that “repairs” the boards.
@@joeburner7120 I get paid to analyze the failures and improve the designs. Nobody reuses the boards after I fix them, they get recycled.
"GUNSLINGER FOR HIRE"..., thxs for sharing
Add some electronic components that will fix it!
😎👍
Hello Steve!
Get out the tablet
Hey Steve and Miss Molly! Workin’ again ya’ll. 👍👍
Another pile of ruud, steve
Hello Steve!