Power but no heat

You can Google the modle number and then put owners manuel. It will doenload in a PDF.

The possible reasons are: 1) The high voltage transformer is broken, 2) The magnetron is broken.

For the 1st problem, no power can be applied to the turntable.
For the 2nd problem, the magnetron is broken with no microwave can be issued.

When the unit displays a message like "Change Filter", It's not apparent to the user how the unit knew the filter needed to be changed. On many units, it monitors the amount of time it has been cooking and after say 100 hours, decides its time to change the filter. The unit doesn't know that the filter has been changed. The filter timer must be reset. Check your owners manual to find out how that is done.

quite likely your microwave is trying to prevent it self from self destruct, because if the fan is not keeping the electronics components cool enough while its running the high limit thermo will disconnect power from the heating circuit, if the fan is not working it should be replaced , that's a techs job.

I’m happy to assist further over the phone at https://www.6ya.com/expert/phillip_77d32603f8052503

first suspect is the inverter board (power) and magnatron a distant second----in either case the part involved unless an expensive unit is pricey.

You have a bad high voltage diode, bad filter capacitro or a bad magnatron. The diode and capacitor does not cost very much. You can get them at www.mcmelectroncs.com . Replacement would mean removing the unit from under the counter, remove the case. Locate the diode and capacitor. They should be near the power section and the diode is attached to the chassis and one side of the filter capacitor. After replaceing both parts if the unit will not heat you would need a new magnatron. The part is fairly expensive but depending on the cost of your unit it may pay to replace it. Let me know if you need anymore help.

hardrocko

Thanks for using FixYa

The first thing I would suggest is a hard reset. Unplug the unit for a minute or so. Then plug it back in, set the clock and try again.

If that doesn't work, leave it unplugged for about 5 minutes.

Please note that FixYa is not currently notifying us Experts when Clarification Requests are answered.

So if you need further free help, please post a NEW problem to FixYa, and please include your brand name and the full model number from the tag in or on the unit, and your symptoms.

I think you very possibly have a 2 part problem. Firstly, replace the lamp assembly, then replace the turntable motor. If you have a little electrical knowledge, place a tester on the turntable wires when microwave is on and check for voltage.Remember, run microwave as if you were cooking (Place water in unit when switched on).If there is power, then the motor is faulty.

Test the high voltage capacitor, the rectifier diode.or the magnetron.

The diode and capacitors can br tested. The capacitor must be allowed discharge before testing, or you risk to get electrocuted, even if power is off. Capacitors can get discharged by shorting their two contacts.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.

All locations, and description of this parts can be located using the diagram here: Counter top.

Parts must be tested to find out what is wrong.

Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.

Regarding parts, contact the seller here to purchase parts.

If you have the experience with discharging a capacitor and you have a (VOM) Volt Olm Meter. Unplug microwave, discharge capicitor, and check the resistance of the two thermal cut-off discs by removing the lead and set VOM to RX1. If you don't get a reading of zero, replace the discs. If you found any of these suggestions helpful, please rate my solution. D. Lange