Customer Questions and Answers for Thrmst-Fix by Whirlpool

Edith, First you will need to remove the M/W from the wall, then remove the outer cabinet, so you can access and test the primary door switch, the MW relay on the control board and the thermostat on the magnetron tube, with a multimeter. You will need to be very careful, these are high voltage components and you can hurt yourself if you aren't careful. The additional information we sent you may be a bit more helpful. Thanks and Good Luck