JVM1442WA01 General Electric Microwave - Instructions

There are 4 thermostats (aka TCO = Thermal Cut Out) in the GE JVM1440BH04
The schematic is under the cover in a black envelope to the top left of the unit if you face the door.

Check the fuse first. You can remove the front grate, then the numpad on the right. The fuse is right behind it. It's a 250V 20A Class F fuse.

There are four (4) TCOs or Thermal Cut Out thermostats in this puppy:

1) There is a thermostat behind the button panel to the left, facing down. If blown, it breaks the power coming into the unit and will cause a no power situation.

2) There is another TCO or thermostat near the top lamp, to the left, in a small cavity. That one also breaks power to the unit and will cause a no power situation. It's a 100 C / 0 C thermostat. This was the one that blew on me after I left the stove running (for heating in a black-out) under the microwave.


"Cavity TCO" or "Thermostat" part number 61 on the schematics, part number PS239319


3) There is yet another power-breaking TCO or thermostat in the cavity behind the fan that cools the microwave coils. You have to remove the sheet metal on the right of the microwave to access it. This one also breaks power and will cause a no power situation.

1), 2) and 3) should test out to be 0 Ohms with a resistance meter (Digital Multimeter) if working correctly.

4) There is a thermostat which normally does not let current through it. It is mounted in a vertical position to the back wall behind the front panel on the right. This one is used for the sensor reheat function apparently and will close when the temperature in the microwave reaches approx. 60 C.

4) should have infinite resistance with a resistance meter under normal circumstances.

1. remove microwave from wall
2. remove cover (many screws)
3. remove nuts holding magnetron in place (4)
4. remove magnetron (this is a pain due to the plastic molding used to direct cooling air through the magnetron
5. get new magnetron in place (this was even more fun to find the right angles to tilt to get the magnetron to fit
6. re-tighten the 4 nuts on the magentron
7. put the cover back on
8. put the unit back on the wall.

bonus repair: the display flickered while the magnetron was on (cooking ) prior to the magnetron dying. found a ribbon cable on the control board to the display with an aluminum foil shield that had peeled off (adhesive failure). re-installing the aluminum shield with packaging tape, and the display no longer flickers

Over the range microwave. Replaced magnetron. Completely disassemble the case top and bottom.
Remove screws from bottom of HV transformer. Magnetron will not clear without this removal.

Remove nuts with socket from top of Magnetron. Remove thermo unit from old magnetron and attach it to new. Replace and bolt down Mag. Replace and screw in HV transformer. Make sure all wires are reconnected.

Put it back up on the wall. Took about three hours from taking it down from wall and putting it back up.

The old fuse is perfectly good. The new ones arrived within a day.

1. turned off electricity -- unplugged the unit 2. removed 3 screws on top of top vent, removed vent screen then I located the little white cylindrical fuse and popped it out with a table knife. Then I popped in the new fuse. Replaced the vent screen and screws -- plugged in the appliance and it is working again.

I used the kitchen knife to remove the inside cover on the door. There are tabs which hold it in place along the vertical sides. Then removed the two screws holding the handle in place and replaced it with the new handle. Replaced the inside door cover. Thanks for the tip on using the knife to remove the inside cover!! It was easy!

This did not fix my problem. I've ordered a new microwave.

First off, UNPLUG THE MICROWAVE.

The fuse is located under the plastic grill at the top of the microwave. It's held on by two screws. Once you've removed the screws and taken off the plastic grill, you go to the right side of the microwave and remove another screw that holds a small metal grill in place. Removing the small metal grill is probably the toughest part of this repair. You kind of have to rock it back and forth a bit to get it to release. Once that's off, you can get to the fuse. I removed the burnt out one with a pair of needle nose pliers. I also put a small piece of cardboard under the fuse when I did this so I didn't accidentally drop it into the innards of the microwave. I did the same thing when I replaced the new fuse. I then plugged the appliance back in and made sure it worked. Once that was confirmed, I replaced both grills.

Loosen screw holding glass cover plate in place over bulb. Glass cover plate will swing down. Unscrew bad bulb, replace with good bulb, reset glass cover and tighten screw.

This repair could not have been easier! The website was great at helping to identify the problem and the part needed. Users discribing how they did the repair gave me the confidence to do it myself. I got the part the day after I ordered it, installed it and my microwave was a good as new! It was as simple as unscrewing seven screws to remove the bottom of the microwave. Then two more screws to remove the part. Unplug the broken drive, plug in the new one and screw everything back together! Don't forget to unplug your microwave before you begin.

Great website!

remove old film, apply new film. real easy. no magic

I first took the filters of the exhaust and then removed the screws on the bottom of the combination microware hood fan. Once the 6 retention phillips head screws were removed from the bottom of the microwave, and the hinged bottom "door" lowered the motor was exposed. I removed the motor by removing the two phillips screws and unplugged the motor. The hardest part was finding a replacement on the net because most shops did not give enough details or pictures to know if a part was exchangable or a replacement. Partselect.com listed the parts, motor voltage, and had pictures so that I was comfortable with ordering. The part arrived the day it was scheduled to and I simple reversed the process and within 5 minutes I had the microwave motor in and back together. It is nice to do business with a place that also gives you a returns policy upfront.

First i pick up all the tools that I thought would be needed for the door handle replacement. I looked at the exploded diagram online, but did not know how to remove the inside panel to expose the handle mounting screws? I did not want to break any more plastic parts by pulling to hard on the old weaken parts. I have 30 years experience repairing office and banking equipment but never took a microwave apart.. Next I read two reviews by two different women explaining how easy it was to take off the inside panel with a butter knife---yes a butter knife. The knife worked great and I never would have used a knife. Everything just unsnapped from there on. Thank You to those women.

Removed upper cover. Removed screws in cover plate & motor mount. Removed inner cover with pop screw inside microwave. Reversed procees to install new motor.

Had trouble isolating the problem, so I had a repairman identify the problem, then I ordered the part and replaced it myself.

Removed screws holding the grill in place. Removed air filter, removed screw holding plate under the filter in place. Reached in under fan cowling to find the thermostat cut-out. Disconnected the two wires. Put the new thermostat in place. Replaced screws plates and filter in reverse order.

Went to onlin source, found a couple youtube videos then went to the GE site which had a not-too-easy that find trouble shooting guide. It was extremely helpful as it described a fuse as a fix 80% of the time for touch paid failure. I really didn't believe it would b a fuse, but it was the cheapest fix, $8. I got the fuse and was surprised to fine there are two of them on this model. I took a guess and replaced the top one ( neither fuse was black or burned to indicate a failure but the top one was a bit mor greyish). put it all back together and it works fine.