Appliance will not heat,but operates

Sounds like the magnetron tube has burned out so you don't get power. It's the heart of the microwave. Time to shop for another, not worth repairing.

When you press the "Start" pad to begin cooking, do the inside light, cooling fan, and turntable ALL come on?

If not, which do and don't?

Is the oven louder or quieter than usual?

Magnetron and accompanying high voltage diode are usually to blame. Everything else works but the magnetron isn't resonating (providing the proper energy to excite your water molecules).
An appliance repairman can change it for you (typically $180) or you can get a new microwave.

It sounds like the micro generator has died.

Yes, you should buy a new one as the cost of repair is likely to be high.

Most of these are belt driven. You need to uncase the unit and check the belt.

Like anything with high voltage, use good safety practices.

Use a hair blow dryer to dry out the underside of the microwave. After you are convinced that it is dry you may operate it again.

That said, if it still is acting up read this:

When the microwave sounds okay, but there's no heat, one of the internal door switches, the high voltage circuitry, or the circuit board may have a problem. To resolve this problem, you need the assistance of a qualified appliance repair technician.

Remove the turntable plate and check the motor coupling gears underneath, if motor coupling is fine, then replace the turntable motor.

Enter the model number on one of two websites below to get parts and diagrams for your appliance:


Appliance Parts From PartSelect

Appliance Parts Pros

if everything works except the heating, it is most likely the mag tube is on its way out.........that is the most common reason for it not too cook.......since the microwave is a GE and it is 3.5 years old, i would say you are better off buying a new microwave, the mag tube starts at around $70.00 and up + the labor it costs too have a service person put it in........around another $60.00

The fact that the microwave and convection both do not heat indicated that the oven is in demo mode, check the user manual, otherwise it will possibly be a relay not triggering, may need a pcb replacement, check Demo mode 1st....Phil

you may have gotten a power surge and that can cause some funny things to happen, 1st is there power to the oven, 2nd if so there may be an internal fuse protector built in to the oven, check with the manual for anything of that sort listed. if not you may have to take it in and have it repaired by a pro. there is a lot of voltage in these ovens and unless you know what you are doing a person could get hurt