Lost power due the storm' when power was restored micro. never came back on

You got a power surge that damaged the control system.

The "PF" on any appliance indicates a power failure. So if you lost power in a recent storm, this would cause your problem. Pressing the cancel button should clear up your problem, and put you back in business. If not, unplug the unit, plug it back in and try the cancel button again. If trouble persists, your board is probably at fault.

This could be due to a intermittent micro switch, or a faulty cooling fan. This is critical in keeping the magnetron cool when cooking.

Make sure that the program controller is working if not check power - step down supply, the pads are responding- if not faulty pads- or the door switches, if the switch contact are not good then it will not trigger the processor to switch on the waveguides. If the lights or fan work without any display or action of program being triggered to start then it can be a possible fault on the main board or the processor. Sometimes insect secretion can short the board and display panel and so the processor can work in such an erratic manner. If so clean, solder and reset the board. Now identify the parts by clicking this link: http://www.espares.co.uk/advice/microwave/a/5/141/identifying-microwave-parts.html

If there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron. Check this link to know how a microwave works:

http://www.espares.co.uk/advice/microwave/a/5/1443/how-a-microwave-oven-works.html

You might try pulling the plug on the unit and leaving it overnight. The electronics may have locked up due to irregular voltage during the failure. There may also be a GFI (ground fault interrupter) on that circuit that has tripped for the same reason. Check the kitchen outlets for a tripped GFI.

CHECK FUSES INSIDE MICROWAVE

Sounds like you should get estimates and turn in on homeowners insurance. Power surges are very destructive and you have lost the control board at least and maybe some switches. Eric

Hi

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. As there was power loss due to storm so I believe it could either be the the high voltage circuitry, or the circuit board . To resolve this problem, you need the assistance of a qualified appliance repair technician.

Please do rate the solution as FixYa and revert for further assitance.

Thanks
Rylee

Hello rarms1965... chances are that your microwave was the recipeint of a power surge during the power outage you mentioned.. there is no way of knowing what component took the brunt of a surge and it could very well be your magnetron tube, filament transformer of any number of control logic components.. The problem is that anytime you open the case to check things.. unless you know what to look for or even more so.. what NOT to touch ( High Voltage Capacitor comes to mind) you don't know what you are up against. If it isn't a real expesive model ( you didn't provide a brand or model with your inquiry).. then the cost to diagnose & repair could very well exceed teh cost to replace.. Your call.. but whatever you do.. be sure you KNOW what you are doing..
Good Luck my friend..