Question about GE JTP45 Electric Double Oven

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GE JTP45B0A1BB double oven. Upper oven is very slow to heat, when set on bake, it takes 12 minutes to reach 350. Lower oven functions normally, when set to bake, it takes 4 minutes to reach 350. I swapped bake elements between upper & lower ovens - problem unchanged. I swapped temperature sensors between upper & lower ovens - problem unchanged. Lower oven functions normally with swapped parts. I performed an electrical test with dual meters. Upper oven bake element always receives ZERO volts, when set to bake, during the entire 12 minutes that it takes the upper oven to reach 350. Upper over broil element receives 240 volts when set to bake (it cycles - on for 15-30 seconds, then off for 60 seconds, and repeats). So upper oven is being heated entirely by the broil element (when set to bake). I traced the power wire from upper bake element, it plugs directly into the control panel, next to a power relay. Could the power relay be bad? If so, can the power relay be replaced, or must the entire control panel be replaced? Any other possible causes? Please help. Thanks!

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

catriver
  • 878 Answers

SOURCE: Electric Oven doen't heat

cdkd, there should be a TC0, on the back of the oven. Thermal cut out. You want to check to see if it is open. You will have to pull the oven out enough that you can remove the back panel cover and check it. The lower and upper oven should have one. It's a very cheap part to replace. If this TCO fails, no heat. Check this first before buying a new board. Catriver..post back.

Posted on Dec 27, 2006

watugot
  • 290 Answers

SOURCE: OLD GE Wall Oven doesn't heat properly

On these older ovens ther is usually always 120 volts on the elements at all times.
If you check across the element ends with it in bake you should read 240V. If not, there is a problem with the control. With the voltage drop you describe, it sounds like you are losing power on one line of voltage coming to the element.
Post back to let me know what you find out or if you have any questions.

Posted on Nov 24, 2007

  • 408 Answers

SOURCE: Oven will not heat

Sounds to me like your bottome element is burned out.  I would replace this, or at least take it out and bring it to an appliance store to have it tested.

Posted on Mar 04, 2009

  • 3230 Answers

SOURCE: GE JTP 1580W288 Set oven to Bake, switches to broil at bake temp

The F2 Error code means the oven has detected an excess temperature condition. Most often this is due to a bad temperature sensor - the sensor costs about $75 from an online repair site. 
How to remove and replace the temperature sensor. In most GE ovens, when you open the door, you'll see the rod-shaped temperature sensor sticking out of the back wall at the upper left. It's about six inches long and a bit more than 1/8" in diameter, held in place with two screws. 

Turn off the circuit breaker (built-in ovens) or unplug the range before attempting the replacement. 

The replacement sensor will come with instructions, but basically it's a matter of removing the sensor, pulling out the wires to where they are connected and disconnecting them. You may have to snip. The replacement sensor will come with high-temp wire nuts to hold the new connection. Polarity doesn't matter; it's a straight resistance thermocouple. Hook it up, be sure you poke the connections back far enough so that they're on the other side of the thermal insulation and not resting against the back of the oven. 

If you continue getting the F2 error after replacing the sensor, then the problem is likely in the control module - this is the circuit board behind the keypad and clock. 

You'll need to remove the decorative bezel to get behind the control panel. Remove screws and set off parts in order - it's not complicated. Once the bezel is off there are two more screws that hold the panel in place. Then you can lift the panel up about a half inch and pivot it forward toward you. You'll see a bunch of wires going to a circuit board. 

On the panel you will notice some black plastic boxes that say "Potter & Brumfield" on them. These are relays. Check the relays - slide the black plastic cover straight up to expose the coil and the contacts. The coil, when energized, closes the contacts - look at all the relays. You can manually close the contacts with your finger (be gentle). If the contacts of one of them are stuck, they might be welded together. You can fix the problem by prying apart the welded contacts gently with a knife blade. Take some time to gently polish the relay contacts with a folded bit of fine grain sandpaper - this will get some more life out of them. Be gentle and careful - the relays aren't complicated but if you bend the contact or rip it out, you'll have to replace the controller, which will set you back a couple hundred dollars. If you unstick and burnish the relays, they will probably eventually weld together again as the rough spot will spark, but when you burnish them with sandpaper they should be good for some more life before they need to be replaced. 

If the problem isn't the temp sensor or welded relay contacts then the problem is obviously somewhere else, but temp sensor and relay contacts will account for the lion's share of F2 errors. 

Once again, be safe, be careful, be gentle. Ovens are not very complicated and they're tough, but always exercise care. Always disconnect electricity before messing with them.
good luck,

Posted on Jun 28, 2009

Daniel S
  • 4323 Answers

SOURCE: My GE double electric oven

Hi

If the error code still appears, then the problem is likely in the control module (circuit board) behind the keypad and clock. You'll need to remove the bezel to get behind the control panel. Remove the screws & lift the panel up about a half inch and pivot it forward toward you. The circuit board you can now see is the Control module. Check for the black square shaped components on this board, they may be burnt or the connection might be loose. Look for welded relay contacts on bake or broil relays. If this happens, replace oven control (also called clock or ERC).
Hope this helps... If it does please do not forget to accept the solution or post back for assistance.

Daniel

Posted on Oct 11, 2010

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