Oven Repair: Broil Element Not Working - Relay Replacement
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- Опубликовано: 19 фев 2022
- This Kenmore Elite oven had a buzzing noise coming from behind the control panel when the broil element was supposed to be on, and the element wasn't coming on.
Since the element had previously been replaced and tested as working, and the thermostat and all other oven features worked, the control module was removed for troubleshooting.
The issue was a malfunctioning relay so it was replaced and now everything functions normally.
OZ-SS-112LF Relay Datasheet: www.te.com/commerce/DocumentD...
ULN2003 Datasheet: www.st.com/resource/en/datash...
Relay Insulation Class info: americas.hammondpowersolution...
S-993A Desoldering tool (affiliate link) used to remove the relay
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Finally and thank you so much, every bloody video stops at the element itself, after running continuity of the element and finding no problem I'm left with no schematic and no idea which is the problem or even what else to test. I already considered the thermostat but the control module does show temp increase from the bottom element when it's on so I have to assume the thermostat is working. My real question is was any of this "computerized crap" actually necessary? Let's face facts, on/off, bake/broil, good old fashioned hand dial for temp, what more does anyone really need for a stove/oven? Don't get me wrong, I fix electronics, I just don't see the need for a computer when cooking a roast or baking a cake. After fixing my fancy new washer and dryer ten times in ten years, a washer that took 3 hours to do a load and called that energy smart/water efficient, I picked up a free old dryer and washer, both which wash and dry my clothes in less then an hour, nothing fancy, clean clothes fast and efficient. To be fair, the dryer was given away because the old dial won't tick down and stop on it's own. My thought is, who cares? I throw the clothes in, start the dryer, go have a cup of coffee, come back and the thing has dried my clothes, that's not so hard is it? The old garbage, as people think of it, fast, efficient, simple and most importantly durable, the damn things pretty much last forever. Remember when the Maytag man didn't have any repair work to do and he was always sad and lonely and that was considered a good thing? Well, I suppose the upside is, the Maytag man is busy as hell now and hopefully no longer sad.
I have a slightly older Kenmore oven which had a similar problem in the past. In this oven there is one relay which switches the power to the elements and another which toggles between the two. The controller is designed so that the power is switched off to the elements while they are being toggled to prevent the toggle relay contacts from arcing. The element toggle relay was the culprit. It had overheated and melted the solder on the PCB. I happened to have a new relay of the same type but a slightly higher current rating in storage, since I had purchased two of them for a past repair of an intelligent battery charger. I installed the new relay and the oven hasn't given me any more trouble since.
I bet guys like us have saved thousands or more by doing our own fixes.
And it helps pass the time!
Very nice work! I'm guessing that board would have been 150 to 200 used and the oven a lot more than that. Fantastic.
Yeah I forget if I looked up the cost of replacing the module (it was months ago) but I figured it wouldn't likely be worth fixing if I had to do that, so nothing to lose by ripping it apart!
Nice work and 10/10 for explaination. Thank's to help for pollution. normaly every body put on trash
And there it is, the right to repair in action !...cheers.
hopefully they don’t start using relays with serial ID chips inside to prevent repair in the future
@@GadgetReboot - What they do now is pot the entire thing half way deep in the most adhesive 2-part poured-in silicone goop they can find. The PCB is lowered into a shallow plastic tray prior to potting.
This is not for conformal coating, and the tops of components are primarily still exposed to air for cooling. It's done so that you cannot get access to the solder connections on the rear of the PCB, and the base of larger parts like relays is so embedded you cannot just pull them out.
The stuff cannot be cut with a regular Dremel, as it gums up the disk. It's extremely difficult to cut with a knife, and heat doesn't soften it. And it sticks like sh!t to a blanket, so you cannot dig it off like that white stuff they glue large capacitors with. It takes great skill to repair a PCB with such a coating.
now I’m curious to take apart the new oven I bought last year to see how it was done, but it is so tedious to access, it may take a while. And I don’t want to accidentally break anything by being curious.
Thank you for this very informative video. Is it possible to test the relays while they are still soldered to the control board? I removed the control board and opened it up, but I'm hoping to avoid de-soldering in case I need to send the board in to have it worked on by a professional. Here's the problem with the oven, FWIW: The bake and broil elements were not turning on despite testing good with a multimeter (along with a good temp sensor), and I noticed that there was no clicking sound from the control board, indicating that maybe a relay was bad (no error codes on display). I used a screw driver to tap on the two relays that I saw, and the relays then began working; i.e., they clicked and successfullly turned the broil and bake elements on and off. This worked at several lower temperature settings; but, as I tested with higher and higher temps, the relays eventually stopped turning the elements on and off again. I assume this was because one or more is faulty, and perhaps the heat from the oven exacerbated the problem? Anyway, upon opening the control board, it appears that the solder joints of the relays do look good; so, I'm guessing it's one or more of the relays themselves that have gone bad. BTW, there is a slight humming sound that the oven is producing when plugged into power (i.e., it buzzes whether the oven is put in bake/broil mode or not). The hum appears to be coming from the buzzer unit on the control board--it's not particularly load, so this may be normal, but I suspect not. Any input would be greatly appreciated!
As an additional note: One of the relays says "N.O.: 15A & N.C. 10A & 125 VAC" while the other says "30A250VAC & 15A125VAC". I don't see anywhere that has the "12V" marking like yours does. Does this mean I cannot perform the test you did? Sorry, I'm a complete newbie with this stuff, but I love to learn and fix things!
As a final note: I find it strange that both relays would go bad. I wonder if there's a common component upstream of them that could be the culprit?
Broiler on = smoke detector testing, dam stove is a critic, nice video
I have the opposite problem with a Kenmore electric stove, the broiler element was stuck on so I disconnected it. It takes longer to preheat but it still bakes just fine. I would like to fix it but don't want to spend three hundred dollars for a a new digital board. Just a few dollars for a relay.
It always seems to be the bake relay that fails first on these range boards. It's almost like failure was "baked in".
Yea though its used more often. But mine got fixed next day its out again
Merci, interresting.
What causes a relay to go out after you replace it? Fixed the problem. Next day it doesnt work again.
Do you have a video on how to test the ULN chip?
Never knew the top element had a name other than top element. Never changed an element yet but a few fans in the main oven. How they fans stay running for so long with a right red element around them i don't know.
My previous oven was 14 years old and didn’t even have any issues at all, I should have taken the appliances when I sold the house and moved out, probably get more life out of those than anything I buy new
The top element in an oven is usually just called the the top element. Traditionally an oven only has heat from the bottom, however a top element helps with browning food. The term "Broiling" means "cooking with direct heat from above", so outside the US/Canada top the element might be called the "Griller element".
Sometimes there is a slide in Broiler (US) or Griller (non-US) Tray just below the top of the oven. That tray is used for cooking garlic bread, steaks, sausages, etc where there isn't a separate broiler/grill compartment.
@@johncoops6897 we have a twin oven, so main oven has bottom - top - fan, top has botton and top(grill). I just love the way we all speak english but have different names for things.
Great job!
Can you please advise where can I possibly find service/repair manuals or at least an electric diagram for a NEFF oven? for U16E74N3GB or U16E74N3 in particular. Thanks!
I tried looking briefly and couldn’t find anything, I noticed some model numbers of that brand have a wiring diagram at the end of the manual but some don’t. In my case I think I found it online but also there was a print out of the wiring diagram inside the oven. I don’t know if all ovens do that.
and if my broiler element doesnt come on when self cleaning is it the same issue i have about the same oven. self cleaning oven frigidaire
I wonder if something similar is wrong with two of the burners on my electric stove.
depending on the model, and if it’s more old-fashioned like actual heating element burners compared to a glass cooktop or something, the element for the burner may be bad or even the part where you turn the knob to turn the burner on or off might have its own separate module and there could be things like temperature sensors directly between the burner element and the little control board directly connected to that burner’s dial.
if there is a wiring diagram paper inside the back of the oven like mine had, you would have a better idea of how everything is wired up and then you could just look and see if there’s extra control boards or if it’s just one main control board to diagnose.
@@GadgetReboot well the stove is about forty years old or so. I'm hoping it could be an easy fix.
So stupid that this isn't a FRU
Great job!!