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Microwave would run when door was opened, tripped breaker, wouldn't run at times, door opening and close would help/hurt operation
The breaker was tripped but fuse was ok on testing. I kept the fuse for possible future repairs. To access door switches and fuse on this model JVM1850CF001, remove 2 phillips screws at top. Then slide the grill to the left (toward hinges) about 1 cm and it should easily come off forwardly. Remove phillips screw underneath grill attaching the main panel. Lift the panel 1 cm and it will easily come off forwardly - I let it hang by the electrical cords. Now you can see/discharge capacitor(s). Remove 2 star screws inside door to loosen/remove/access door switch frame. 3 switches are held in the frame by plastic tabs - one tab per switch. One is primary and 2 are secondary door switches. I removed each switch one at a time by lifting tab, pulled off the electrical connector and filed the male metal connection on each switch. I replaced the switch with a loose button (loose and didn't click as crisply compared to the other switches) with a new secondary door switch. It was the lower secondary switch. Worked like a charm after that.
-unplug -remove top and front covers -unplug wire connectors from heating assembly -remove heating assembly from metal stand and push out of the way -remove metal stand from dry -pull out heating assembly -install new one in reserve order
time would count down but unit would not run & heat.
remove cover, unplug secondary door switch (top switch) remove switch from holder, install new switch, plug in wires, replace cover, very easy. door switches are a common problem with microwave ovens.
Used a phillips head screw driver and loosened the lens frame under the microwave. Removed the broken lens and replaced it with the lens ordered. Put the lens frame back in place and secured it with the phillips head screw.
Removed three screws from the top front cover and slide it out and following I removed the touch panel and the housing that holds the switches and replaced the bad one.
All one has to do is use a screw driver to remove the screws, one per lens. Then lower the lens bracket, bend the 4 tabs holding the lens, remove and replace the lens and screw the brackets back in place.
Light worked, timer and control pad worked, but no turntable, no heat, no noises of any sort, just didn't start up
It was a snap using the instructions given. The key is getting into the unit. I did have to use a multimeter to find the failed switch since there are two of that type.