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Srh1230zg oven is in my 5th whel camper, I plugged into bad 50 amp [ floating ground] micro doesn't work, can you fix?

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Timer works & oven works but microwave doesn't go on


Most often this is a bad door switch or door switch mount.
See my help file on door switches here.
You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Mar 19, 2013 | Microwave Ovens

2 Answers

Where are the fuses in my microwave oven,?


Inside behind the display panel on a small circuit board.

Jan 01, 2013 | Magic Chef MCO160UB Microwave Oven

1 Answer

LED not working


see this causes and fix it. God bless you
If you have a stuck key or non-responsive key, most of the time you will have to replace the keypad for this microwave oven repair. If your keypad is connected to your control board by a flat ribbon wire, try disconnecting it and clean the silver contacts with an ordinary pencil eraser. After cleaning, plug it back in and try it. If it doesn't fix it, replace the keypad unit. Some units actually have keypad tests to confirm your diagnosis of a bad key.If your keypad and control is the same unit, replace that unit. Another note, unlike stove/oven keypads and controls, most microwaves do not have error codes or tests to distinguish whether it is truely the keypad or control. Most of the time, it is the keypad that needs replacing, but a small percentage of the time it can be the control. Check the tech sheet if they can point you to the right part.

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Oct 10, 2012 | GE Advantium 120 Convection/Microwave Oven

1 Answer

Sharp micro doesn't heat


see this causes and fix it. God bless you
Diode The high voltage diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron which emits the energy that cooks the food. If the diode burns out, a lower A/C voltage reaches the magnetron, which is not sufficient to power the magnetron. When the diode fails it is often visibly burned out. If it appears to be good, it can be tested with a volt-Ohm meter capable of testing diodes. High voltage diodes frequently fail and are one of the most common points of failure in a microwave oven.

Door Switch If the microwave does not heat, one of the door switches might be defective. Microwave ovens normally have three door switches, if any of them fail the microwave does not turn on and does not heat. Check the switches for continuity with an Ohm meter.

Magnetron If the microwave oven doesn't heat the magnetron tube might have burned out. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. If the microwave oven is turned on when it is empty this can cause the magnetron to burn out. Once it is burned out it has to be replaced, it's not repairable.
High Voltage Capacitor If the microwave doesn't heat the high voltage capacitor might be defective. The high voltage capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. If the capacitor is burned out the entire high voltage circuit stops working properly. The high voltage capacitor can be checked with a special VOM meter which has a capacitance testing capability. Be aware that the high voltage capacitor can retain a charge of more than 3,000 volts and can injure or kill a person if not handled properly. Only trained technicians should perform this type of testing.

High Voltage Transformer If the microwave does not heat, the high voltage transformer might be burned out. Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food.

Thermal Fuse If the microwave doesn't heat the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.

Thermoprotector If the microwave doesn't heat 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.

Main Control Board If the microwave doesn't heat the main control board may be defective. This is not common. When a microwave doesn't heat the problem is usually within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.
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Oct 02, 2012 | Sharp Microwave Ovens

1 Answer

Replaced 20amp fuse that was blown. new fuse did not blow, but oven is still dead.


see this causes and fix it. God bless you
If your microwave oven doesn't seem to work at all, check these: Fuses Door switch 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
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Sep 22, 2012 | Cuisinart CMW-100 Microwave Oven

1 Answer

LG touchpad doesn't work


use the common sense,logically, fix it. God bless you
a stuck key or non-responsive key, most of the time you will have to replace the keypad for this microwave oven repair. If your keypad is connected to your control board by a flat ribbon wire, try disconnecting it and clean the silver contacts with an ordinary pencil eraser. After cleaning, plug it back in and try it. If it doesn't fix it, replace the keypad unit. Some units actually have keypad tests to confirm your diagnosis of a bad key.If your keypad and control is the same unit, replace that unit. Another note, unlike stove/oven keypads and controls, most microwaves do not have error codes or tests to distinguish whether it is truely the keypad or control. Most of the time, it is the keypad that needs replacing, but a small percentage of the time it can be the control. Check the tech sheet if they can point you to the right part.


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Aug 02, 2012 | LG Microwave Ovens

1 Answer

No Power to anything in camper other than the Microwave Oven?


The main fuse has probably blown in the microwave oven.

Apr 15, 2012 | Microwave Ovens

1 Answer

The microwave doesn't work at all. no display, light, anything


Plug a lamp in the wall receptical in place of the microwave oven, if okay! it means the main fuse in the oven has blown. There are a number of reasons why this happens, a bad fuse, door switch that has malfunctioned, "common" cracked high voltage diode, shorted capacitor, and an open magnetron. I suggest a professional.

Mar 09, 2012 | Panasonic Microwave Ovens

1 Answer

When power went off and then came back on, screen on micro wave continually shows demo and I cannot set time


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 and try again.

If it still won't work, then you may have a bad membrane keypad / DP circuit.

If your model is NN-P295SF, the service is here.

Parts can be ordered from Encompass here.

Aug 19, 2011 | Panasonic NN-P295SF Microwave Oven

2 Answers

Runs but doesn't heat replaced two fuses and magnetron still doesn't heat


Here is your free answer in under 10 minutes ...

You have a faulty door safety interlock switch. I wish you would have searched your problem here before you spent all that money on the magnetron. I have answered this question dozens of times here at this site.

When the oven runs but doesn't heat, more often than not it is nothing more than a faulty micro switch in the door latch system. When the switch doesn't work properly, the oven doesn't know the door is closed. If the door isn't closed, the oven will not energize the magnetron. Capacitors and magnetrons are **** and expensive answers but these items are extremely tough. It is the tiny contacts in the micro switch that can not stand the repeated abuse given them when we (read me in that number too) open the oven while it is energized causing a repeated flash across the contacts.

Thanks for your question @ FixYa.com

Aug 06, 2011 | Microwave Ovens

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