Whirlpool MW shelf support caught fire

Microwave Repair
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1

I originally had a problem with the 4 shelf supports in this microwave, they appeared to look burnt. Ireplaced 3 of them and the fourth is on backorder. My wife used the microwave this morning and the support that had not been changed caught fire, but the other 3 appeared normal. I know this is an older microwave and hope someone can help me figure the problem out. Thank you.

Mike

2

I have seen this a number of times.
I have alway’s replace all four at the same time and never had a problem again.

Change the last one out and you should be fine.