Question about Whirlpool GH7155XHS Microwave Oven
It's almost certainly a shorted cook relay on the control board.
The relay has two metal tabs on top where the wires are connected.
There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.
At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.
Be sure the oven is unplugged, then you can measure across the two tabs and I think you'll find the tabs are shorted.
A new board for this model runs over $150, but we regularly repair such control units for customers nationwide by mail for $39.95 postpaid in about a week with a one-year guarantee.
Feel free to contact me directly (and please remind me of your full model number) for more information & help.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
William E. Miller
Posted on Jan 05, 2009
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Posted on Jan 02, 2017
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