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My microwave went blank the other day. Replaced the fuse and everything came on, including the inside light even thought the door was closed. Able to set the clock like normal, placing it back in the wall then opening and closing the door, blows the fuse again. This microwave was serviced not too long ago and supposedly all the interlock switched were replaced. Any tips?
Hi @donald1425 , What is the model number of the microwave? Just wondering if fuse can be replaced with the door closed and then the power is applied to the microwave and the fuse doesn’t blow but when the door is opened and closed again whether it is a loose wire (interlock switch?) touching the chassis due to the vibrations caused by closing the door and then blowing the fuse. Have seen where a switch wire was accidentally jammed under the switch after it was replaced and the insulation was eventually cut through and it blew the fuse. Worth a look for flashmarks on the inside body of the microwave anyway. How long ago was it serviced? Most reputable repair services give some sort of time duration guarantee on their workmanship.
yes because I have replaced more than four fuses when its closed runs very well the problem starts when you open the door. burns the fuse sametime
I had same problem - is related to interlock switch wiring. when u close the door that switch completes a safety circuit that engages the transformer and the magnetron. something in that path is shorting the ac hot leg to ground
