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FIXED JTP45 GE double wall oven doesn’t heat

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Tomk32e

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Joined
Nov 13, 2020
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Model Number
JTP45W0D1WW
Brand
GE
Age
More than 10 years
My GE double wall oven model JTP45W0D1WW does not heat. I have already replaced the WB27T10295 control board with a remanufactured unit. All other functions seem to work (light, temp settings, clock, etc) but none of the elements ever start to warm. There are no error codes showing and I have reset the breaker several times. It seems as if a high limit is tripped but I do not find any resettable breaker in this unit.
 

rickgburton

Appliance Tech - Moderator
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40,657
Location
Murray, Utah 84107, United States
Here's the problem I'm having; I get anything to come up with that model number. I can get as far as JTP45W and that's a lot of models. I checked the V1 and V2 series and there's a manual reset thermal limit for the lower oven only. On many ovens L2 is common for all the elements. Look on the board for something like BA1 and BA2. Those should be the relays for both ovens so start a bake cycle and measure the voltage between BA1 or BA2 and L2 where the power cord connects to the machine. If you have a wiring diagram or can take a pic of the back of the control board so I can read the terminal labels and post here it might be helpful.
 

Tomk32e

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Thanks. I haven’t checked voltage yet, but here are a couple pics of wiring diagram:
 

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rickgburton

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Awesome Tom, that works. Where the power supply connects to the oven, check for 220 VAC across the black wires and red wires. You may not need to go any further than that. L2 (red wires) is supplied one side of all the elements directly from the power supply terminal block. On the board you will see L1-1 (upper oven) and L1-2 (lower oven). L1 is supplied to each element through its own individual relay. Chances of all the relays failing at the same time would be rare unless the board burned up. Since none of the elements are working it's most likely a power issue or either the lower or upper oven would be working.
 

Jake

Appliance Tech - Admin
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Aug 24, 2004
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McMullen Valley, Arizona
Rick on these models you have to drop the "0" from the model number, why GE did that back then is beyond me.:)

Here's the parts diagram for his model:

Jake
 

Tomk32e

Premium Member
Joined
Nov 13, 2020
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Ok Rick...problem solved! One leg (red lead) was only showing 1.5v. Traced it back to junction box were my “electrician“ made a very sloppy installation mistake. I’m gonna have to fire that guy! (Oh wait...that’s me...😳)

Thank you for your help! Tom

picture of sloppy electrical work:

1DD4C2CE-3A13-43B6-A328-9A03357B02E7.jpeg
 
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