display would show "Inch" and run thru 7,9,12 then start on its own. Also sometimes displayed "F2"

ApplianceKitchenAid Microwave

ModelKHMS155LSS-4

Level of DifficultyDifficult

Time to do repair1- 2 hours

Age of Appliance1 - 4 years

Tools Screw drivers

Earl From Winter Springs, FL

Sep 26, 2008

4 out of 4 people found this instruction helpful

UNPLUGGED IT
Remove 2 screws on top of the unit holding the grille in- remove the grille
Remove the one screw at the top of the display and tilt the top of the display towards you.
At the bottom is a hinge that slides up to be removed- leave the screw in place.
The conector for the keypad is a ribbon connector that is attached to a black connector about 2/3 of the way up the circuit board- to release the ribbon cable the highest end of the connector has a plastic release clip that you can bend with your fingernail allowing the long edge of the connector topivot about the (lower) hinged end. Not hard to do just don't force it.
Do not remove any wires-remove the screws holding the circuit board on (2 I think) at the bottom.
The top of the circuit board is held in by sheet metal features in the housing- mine were a bit tough but its obvious how to remove it.
The keypad/exterior sheet metal & display assembly should be free now- support and place display up on a work surface.
To remove the current keypad CAREFULLY pry around the edge/junction of the ext sheet metal and the keypad. The keypad is held on with adhesive and will require some effort. Also the keypad extends slightly under the ext shett metal so it will be a pain. the goal is to start it peeling w/o damaging the sheet metal around it.
To remove the remaining adhesive (& paper) use denatured alcohol.
The new keypad is made to go under the ext sheet metal but it isn't possible to install it this way. I trimmed the edges of the new keypad so that it would drop in. You only get one try installing the keypad so make sure it fits before putting it in with the adhesive exposed.
YOU MADE IT!! Is Fixed !!

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Diagrams and Parts List for this repair

Part PhotoPart DescriptionPriceAvailability

SWTCH-MEMB

Part Number: PS390090

No Longer Available