My microwave is not producing any heat its runs but doesn't heat, the cooling fan still comes on. its a SMEG microwave Convection grill oven model NO:SA971C2 could it just be a fuse or something like that..

If your microwave oven doesn’t heat, you may have a problem with the high voltage diode or rectifier. This component helps provide the high voltage that powers the magnetron. The high voltage diode is located near the magnetron and the high voltage capacitor, so access will require removal of the cabinet. Disconnect the power and also discharge the high voltage capacitor to prevent an electrical shock. You can then test the diode for continuity with a multi-meter. Diodes are polarity specific and you should see low resistance with the meter leads in one direction and higher resistance when the meter leads are reversed. Most multi-meters will have a special setting for diodes or rectifiers. If the high voltage diode shows low resistance in both directions or shows no continuity at all, then it will need to be replaced. If you find the high voltage diode tests okay, then you will need to determine whether power is being supplied to the circuit. This is a high voltage circuit and further testing should only be performed by a qualified technician.

Check out the element(s) for continuity.

see the next steps , use the VOM and fix it. God bless you

1. Check the power diodeThis electronic component is responsible for transmitting current in one direction. If the diode becomes defective it will cause your microwave to not heat. Test the diode and replace it if necessary.
   
2. High voltage capacitorResponsible for storing electricity, this part is a key component in any microwave. Remove, discharge, and test the capacitor to determine if it requires replacement.
   
3. Damaged magnetronResponsible for generating waves and producing heat. When your microwave is no longer heating properly, replacement will be required.
   
4. Thermal CutoffsExamine the thermal cutoffs on both the magnetron and the oven itself. Take off one of the leads and using a volt-ohm meter on RX1, check the terminals. If you get a result other than zero, replace the thermal cutoffs.
   

I have seen where one of the door switches becomes intermittent causing the symptoms you are describing, tough to nail down considering there are more than one door switches.

i have samsung microwave CE104VD. suggest how to bake a veg cake. i tried twice but not a tasty result

Hi,

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

Basic Microwave Oven Troubleshooting Tips

heatman101

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

So please post a NEW question, and please include your brand name and the full model number from the tag in or on the unit, as well as the answers to these questions:

Which fan is it?

The internal cooling fan, which comes on automatically whenever the unit is microwaving?

Or the hood vent exhaust fan which you can turn on and off manually?

Or the convection fan, if it is a convection model?

When is it coming on?

Is it coming on whenever you cook on the stove top?

Thanks!

I would say the convection fan blade is loose on the shaft.

If this is the case, it would try to run, but no cooling would take place, so the heat from the heating element would get very high but it would not be distributed through the oven.

The thermistor would then detect the extra high heat and stop it, I assume.

You may be able to use super glue or JB Weld to fix the blade on the shaft, as long as they are clean and dry and it is allowed to set overnight.

You can find helpful exploded view diagrams and order parts by entering your full model number here.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.



Accessing these components for testing and possible replacement will require you to remove the oven from the wall and take off the outer cover.

If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

You can download GE owner's manuals and installation instructions here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

I have a simular model and I found that the circuit board has three black relays, one for the grill one for the convection and one for the microwave. I found that the microwave one wasnt working so by swaping the microwave one with the convection one I got it to work and then replaced the faulty one with a new one at a later date.

the magnetron has failed