Ralph for Model Number JMW8530AAB Serial #12023958YK The control display has been out for some time but the oven still works. I have noticed that the fan doesn't ever come on and i don't know if it ever has. Before i replace the control display, how do i check the operation of the fan, can it be wired to 120v direct to see if it works? i suspect the inop fan allowed the display to overheat. Also when using the oven on 400 recently i got a warning bell until the breaker was tripped and the temp went down.
Answer Ralph, to check for the display circuit, you will need to remove the control panel and access the back of the clock/erc and unplug the J1 connector( four wire/pin connector at the side of the clock back. Turn the power back on and with a multimeter check for 12 volts dc from pin 1 to pin 2 and 20 vac from pin 3 to pin 4 of the wire connector, no voltage on either test would indicate a bad main relay board 74006613 or broken wire in the wiring harness 71003404 if you have the voltage then you'd replace the ERC/Clock WP71003424. as for the cooling fan, it is controlled through the resistance of the oven temperature probe and only after a speific amount of time. actually the cooling fan seldom turns on except under extended cooking period and a higher temperatures. but yes you could attach a 120 VAC test cord to the motor terminals and test the motor for run, if you wish. But please be careful, don't shock yourself or short out anything. Good Luck and Thanks Read More... Answered by AppliancePartsPros.com | Wednesday, December 14, 2011