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Normand  
#1 Posted : Wednesday, February 18, 2009 12:19:27 PM(UTC)
Normand

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Joined: 2/18/2009(UTC)
Posts: 2

When new, my oven used to overheat about a constant 50 degrees high. Now, my oven overheats by 75 to 125 degrees too high. Is this just a bad thermostat (part AP2127907)?

In looking at the circuit diagram, I see four oven thermostats plus a security thermostat! I believe the security thermostat is part 318003600 which is a safety thermostat. Are the other 4 thermostats all part of AP2127907?

Thanks for you help.
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TechnicianBrian  
#2 Posted : Wednesday, February 18, 2009 6:28:13 PM(UTC)
TechnicianBrian

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Joined: 12/2/2007(UTC)
Posts: 769

The four thermostats shown in the circuit diagram are all the same part (AP2127907) as you correctly figured out. It is what cycles the elements to maintain a temperature. If you find the unit is consistently running hot, you may need to replace the part, but first look at the back of the thermostat and see if you find an access hole with an adjustment screw. You will need to play with it a bit to get it dialed in, but you may be able to keep this one running a bit longer.
Normand  
#3 Posted : Friday, February 20, 2009 6:02:57 AM(UTC)
Normand

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Joined: 2/18/2009(UTC)
Posts: 2

Brian, thank you very much for your input. I checked the back of the thermostat and there is NO access hole. The unit currently installed is by Robershaw, model RAC 12-209-18.

I bought an oven thermometer and used that the last time we baked. I currently plan to use the thermometer to help insure proper thermostat settings. If that is easy to do, I'll live with what I have. If it gets to be a chore, I will replace the thermostat.

Norm
TechnicianBrian  
#4 Posted : Friday, February 20, 2009 7:28:12 AM(UTC)
TechnicianBrian

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Joined: 12/2/2007(UTC)
Posts: 769

Sounds good. Thanks for the update.
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