DescriptionThis video provides step-by-step repair instructions for replacing the control board assembly on a Whirlpool microwave oven/hood combo (Model #WMH73521CS6). The most common reason for replacing this part is if the microwave will not work at all.
All of the information for this video is applicable to the following brands:
Whirlpool
Step-By-Step Instructions1
Whirlpool Microwave Oven/Hood Combo - WMH73521CS6
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Microwave Oven Control Board Assembly Replacement
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Tools needed: Phillips-head screwdriver
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Be sure to unplug the power cord or shut off the power supply.
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Use a Phillips-head screwdriver to unthread the three screws securing the top grille.
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Pull the grille down from the top to detach.
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Next, unthread the screw securing the control board cover to the frame.
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Lift the cover up to detach.
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Now note the orientation of the wires connected to the control board?then disconnect them.
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Unthread the screw securing the grounding wire to full release the control board assembly.
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Install the new control board assembly by connecting the wires to the appropriate terminals.
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Secure the grounding wire with the screw.
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Now insert the cover tabs into the slots in the frame and thread the screw to secure.
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Now align the grille tabs with the slots in the frame and snap the grille into position.
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Rethread the three screws.
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Having a magnetized screwdriver will make it easier to rethread the screw on the right.
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Plug the power cord back in or restore the power supply and the microwave oven should be ready for use.