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Had same problem with my KitchenAid. 10 years old. Ran self cleaning cycle, oven died!!!! Called repair. Appears to be thermal fuse. Part on order. Microcomputer had some brown spots on it. Tey wanted us to replace it too. But will wait to see if fuse is problem. Repair - $150 vs. $570. If it's the higher price, we'll buy a new oven before putting that kind of money into it. Will NEVER run a clean cycle again even if I have to buy a new oven.
The thermal fuse is in back of the oven. This is a design flaw of the oven KitchenAid won't admit. Everytime you use the self clean feature this will happen.
The oven has to be taken out to reach the fuse in the back and replaced. The fuse costs about $40+, but the labor will probably run around $300+ unless you feel confortable doing this yourself.
I am about to replace mine for the 2nd time, good luck!
The first time we used our Whirlpool oven the same thing happened - no power and yet the circuit breaker was not blown. I called Whirlpool, and they sent out a technician to check it out as it was still under warranty. He said the temperature was off (too hot) by 20F - he adjusted. He also replaced the blower. What he did not tell me was that the thermal fuse had blown, and he replaced it - this was the REAL cause for the failure. I got the impression that he did not want to let me in on the secret. He did not note on the paperwork that he replaced the thermal fuse. Last week I decided to run the oven through the self-cleaning cycle (the oven is now 8-1/2 yrs old) - I don't believe that we cleaned the oven but a couple of times since the first time that it was "repaired." I used the default 3-1/2 hour setting. Everything appeared to be fine - the oven went through the cleaning cycle with no apparent problems. The display now read "cool down" - I went to bed thinking everything was okay. I got up the next morning only to find out that the power was out. I called Whirlpool and demanded that they repair the unit again as they clearly never fixed it correctly in the first place. They offered me 15% off on a new oven - WHOOPEE! I asked to speak with the supervisor - he did not budge either. I was upset, and I told him that I would NEVER purchase a Whirlpool appliance again! I decided to tear into the oven to see if I could detect anything wrong. I pulled out the front panel - everything looked okay. I then noticed the "thermal fuse" - I did not know what it was called at the time, but it looked familiar. I checked voltage on either side of the fuse and found the voltage to be zero on the downstream side of the fuse. I pulled it out and read the information on the device: Microtemp 110C. I called a local appliance repair shop - they told me that it would cost $50 to purchase a new fuse! I told them that seemed very high. I ended up stopping at Radio Shack. They have thermal fuses in various temperature and voltage ranges. I got a 144C 10A fuse and carefully soldered the connectors to it and replaced the protective plastic sleeve. I actually bypassed the thermal fuse in order to use the oven before I found the replacement fuse. While it is a good idea to have a protection device for the slim chance that an oven may malfunction by overheating, it is not a necessity for the functionality of the oven. Hopefully, the thermal fuse will not fail during my next attempt to self-clean the oven. I do have a concern about the 10 amp rating, but I'm sure that it will work fine.
The problem is they overheat because hot air is drawn in by the blower and overheats the outer chamber of the oven where the thermo fuse link is. The one or two fuse links are blown simple replacement but have to remove oven (two person job) remove outer shell and find it (them) in the back of the oven. Also the fuse link wire going into the main processor is probably blown.
tde, sounds like your thermal fuse (TC0) opened on the back side of the oven. If this opens, it will shut the oven down. This happens alot during self cleaning on built ins. Sometimes I have to re-route the tco to a different area to prevent this from happening. Your part number is 4451442. You will have to pull the oven out far enough to remove the back paneling and replace the fuse....Catriver..post back.