DescriptionThis video provides step-by-step repair instructions for replacing the upper left door switch on a Whirlpool microwave oven/hood combo (Model #WMH73521CS6). The most common reason for replacing this part is if the microwave will not work properly.
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 Upper Left Door Switch Replacement
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Tools needed: Phillips-head screwdriver, T-10 Torx bit, flat-head screwdriver, needle-nose pliers, magnetized screwdriver recommended
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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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Disconnect the thermistor wire connecter to move the cover out of the way.
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Use a T-10 Torx bit to unthread the screw securing the switch holder.
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Insert a flat-head screwdriver to fully release the latch to detach the holder.
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Use needle-nose pliers to remove the interlock spring.
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Carefully detach the old switch.
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Note the orientation of the wires, then disconnect them.
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Install the new door switch by first connecting the wires to the appropriate terminals.
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Now carefully snap the switch into the holder.
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Reposition the interlock spring.
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Realign the holder assembly on the frame, then thread the screw to secure.
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Flip the cam plate forward.
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Reconnect the thermistor wire connecter to the control board.
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Insert the control board 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.