Sharp digital microwave oven is not heating

is it not heating in the bake or microwave mode?

Hai my friend, if its not heating you must open it at the back and check your fuse on top for contuinity using amultimeter it must be on abuzzer and if its fine there is other fuse covered with normal black cover connected to the cspacitor also check it, if this two fuses are fine check your capacitor if its fine check your magnetron for contunuity of 0,2 ohms but normal if its not heating its fuse, thx

The problem is in the magnetron, "heart of the microwave oven" or the inverter board if the system is less than 7 years old.

HI..there is a heating filament of an oven MAGNETRON..it s responsible of producing heat to the oven..possibly this is defective ..this filament must be replaced by a new one..theres no problem with the motor cos it runs the table power and light button seems working..HOPE THIS HELPS..thank yuo for choosing fixya..

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Hello,

Check the oven door if it locks up, the oven has an automatic feature that when it is not closed properly it won't initialize. Since it heats up intermittently I think the heating capabalities of the microwave is still good, and this problem might be just due to something that is preventing it to operate. which most likely the the locks of the door.

One of the door switches is the problem. Open the casing, and you should find the schematic diagram. Find the switches, and test if you can. If you cannot - replace all of them except the monitor switch.

Sounds like the magnetron has failed. This is the component that produces the microwaves that heats the food.

The cost of the magnetron is about 95% of the cost of a microwave oven. Most people don't, for this reason, replace the magnetron, they replace the whole oven which is probably what you will end up doing.

There is a possibility that the circuit that provides power to the magnetron is faulty and you need to take it apart, find the proper electrical leads and test them with a volt meter. To do this you have to remove it from its mounting and take it apart. It is a fairly lengthy process however.


Benjamin

Check the door switch, when it is faulty the oven will turn on but turntable, fan and magnetron wont operate.

Regarding parts, contact the seller here to purchase parts.

You can also order from MicrowaveSvc , they also provide parts.

Most likely the lower door interlock switch is bad. Cheap and pretty easy repair.

Martin Microwave Inc. sells the switches for around $5....

www.martinmicrowave.com