Customer Questions and Answers for Inverter (Compressor Drive Board) by Whirlpool

Hello Tonya. Here are a few things to try to determine the problem for an F7 code on your microwave. Microwave will not operate (cook). F7 error code appears on the display. Electrical circuit interruption between L1 and Neutral in the microwave inverter circuit. Possible reasons: 1. Check door, hinge and cavity front alignment and adjust as needed. 2. Check the operation of all interlock switches. 3. Check over temperature protector for the magnatron. 4. Check all Cavity Thermostats for closed circuit. 5. Unplug the oven for at least 40 seconds. If this solves the problem A. Check the Cooling Fan for proper operation or blockage B. Check the resistance of the magnetron thermostat. It should be 0 Ohms, replace if necessary. 6. Check that the control cable to the 1100 watt inverter is properly connected to plug P2 on the display PCB & Adjust or Reconnect 7. If interlock switches operate correctly, replace 1100W inverter. 8. If problem persists, replace control assembly. Hope this helps.