Microwave stopped working entirely

SEE THE steps and fix it. and diagrams attached.use the DVOM.God bless you

Line Fuse


Every microwave oven has a line fuse. This fuse is designed to blow if too much current is drawn through the microwave circuitry. The fuse can be replaced, but the underlying issue should still be investigated and resolved. Otherwise the new fuse will blow also.
Main Control Board


If the microwave is not working the main control board may be defective. This is not common. When a microwave stops working the problem is usually the line fuse or within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.


Thermal Fuse


If the microwave is not working the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.
Thermoprotector


If the microwave is not working the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown

Remove the case ... look for then check the fuse you will find on the floor of the device. If it is blown, find a replacement at your local hardware store.

Could be the fuse inside the microwave is blown. You will need to unplug the microwave and remove the front control panel. Inisde the microwave housing you will need to trace the electrical wire coming into the unit. Usually you will find the in-line fuse located on the black power wire. You can pull the connectors off the fuse and test it with a continuity tester. If the fuse is blown replace it but make sure you use the same amp rated fuse as you removed. If the fuse blows again then there is an electrical short somewhere in the microwave.

• Make sure that the microwave is plugged into a grounded outlet. It must be a 3-prong outlet.
  
• Make sure the clock is set.
• Check to see if a programming sequence was entered. Sometimes improper programming or a program sequence such as delay start can cause the touch panel to be non-responsive. Unplug microwave or turn off house circuit breaker for 30 seconds. Plug back in, or reset circuit breaker, and try reprogramming unit.
  
• Check the house circuit breaker or fuse box. If the microwave is DEAD and there is no display and nothing works- the problem could be a blown fuse or tripped breaker.

If your microwave oven doesn't seem to work at all, check these: Fuses Usually, when your microwave oven doesn't work it all, the internal fuse (thermal fuse) is blown. This fuse protects both you and the oven. When it blows, you need to have a qualified appliance repair technician replace it. Door switch If the fuse isn't the problem, check the door hooks and the door-release button. When these are broken, the door switch doesn't activate, so the oven can't work.
thanks

The most likely cause is a blown fuse or a kicked circuit breaker. Look in the cabinet above the microwave and see if the microwave is plugged into the ou let in that cabinet. If it is plug a blow dryer or some other little appliance in to that same outlet to see if you have power there. If no power go to your electrical panel and either replace the fuse or turn the breaker off and then back on.

A blown breaker is usually a problem with a door switch or door switch mount.

If you or someone you know wants to look into this, we have *critical* safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

In fact, I have uploaded the entire service manual for this to our site here.

If you find a bad switch, it's best to replace them all.

Please write back with more details if you need further help.

We're happy to help and we appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

I would say a cooktop lamp got shorted by the moisture.

Assuming your circuit breaker is good, the main problem would probably be a blown 15A or 20A ceramic fuse inside the unit.

Once that's replaced, if the hood lights and /or exhaust fan still don't work, then your control panel would need to be repaired, which we do for $39.95 nationwide.

If you or someone you know decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

If and when you remove or install cooktop lamps, the power to the oven must be unplugged or turned off at the breaker.

We're happy to help and we appreciate your thoughtful rating of our answer.

You have oficially BLOWN UP the microwave if you pay a service fee it will be aheck of a lot buying a new microwave would be the same price as getting it repaired sorry about that!

Fan turned on after cooking because a thermostat got to hot and tripped turning on the fan to try to cool the unit.  The unit went completely dead when thermal fuse tripped which is located above the cavity on the left side.