F8 on Ge JTP27 Whats wrong? - GE JTP27 Electric Double Oven

Could be wiring. Did it work before? Maybe, never connected? Could be demand of two oven's and or broilers at the same time exceeded the wire and circuit breaker capacity when installed and therefore were never connected.
Otherwise thermostat. Probably need appliance Tec or Electrician.

Follow the link.

Greetings,
its possible to be the oven sensor or something in the lock circuit...if all else fails then in the electronic oven control which costs 125.00 or there about...might find cheaper price on ebay or internet search The sensor about 40-60 dollars, but without a complete number its hard to be exact with a price or part list...if this is helpful ..please let us know or if I can be of more assistence. let me know...Bruce Denton

If your oven door has gotten bent or warped (maybe you rested something heavy on it...), you need to remove the door, disassemble it, and straighten it. You can lift most oven doors off of their hinges by opening the door several inches to its first "stop," and lifting the entire door straight up. If the hinges have become worn, damaged, or bent, you probably need to replace them. We recommend replacing both hinges at the same time, to prevent uneven wear of the undamaged hinge.

If you can, test for power to the element in the top oven. If there is power coming to the element, it could be that the element is bad and can be replaced. If there is now power coming to the top oven there could be a more serious issue in a 40 year old oven

Yes, this is a problem with the ERC. You can buy a new one, or we can rebuild it for you.

Best Regards,
Bruce
www.fixyourboard.com

F1 is a common error code indicating a failure of the oven control board (aka ERC or EOC). Often these control boards have been discontinued, "no longer available" or are very expensive. We may be able to help and save you money.

We refurbish oven control boards at www.fixyourboard.com.

No watvto know about the fuse without a model #

It would appear you have a faulty thermostat that controls the temp. SUggest you get a new thermostat fitted.

F2 usually means that there was an over temperature condition in the oven cavity. A stalled cooling fan could be a related condition. The usual causes are:
Welded relay contacts. In this case you'll need a new ERC
Cooling fan stalled or blocked air flow to rear of unit.
High resistance inoven sensor leads or connectors.