The clock on my fridgidare oven is making a grinding noise. When the oven isn,t even being used. model # REG533MD-2

1. Replace the clock (if it is replaceable)
2. Disconnect clock power

the model number isn't correct.check and send the model number again.if you changed the sensor this should take care of the f3 error code but the clock shouldn't go blank and oven stops.like i say your model number doesn't show up as a good number,if this machine has a fan in it you could have a bad fan motor,the fan cools off the electronics and if it isn't working the clock assy. can get hot,damage it and it will do this,also i've seen on some models there's a screen where the fan is and dust gets stuck on the screen and the fan can't blow any air,i'm just telling you what i've found before but it sounds like the clock assy. is heating up and shutting down,if there isn't a fan in your model it sounds like you have a bad clock assy.if you send the model number i can look it up for you.

exhaust fan on convection oven making loud noise

Sounds like you overloaded a capacitor on the clock assembly. Before you replace the clock, you should check the voltage to your stove to be sure it's a steady 110 to 125 volts. But yes, it sounds like your combo clock brain got zapped.

F7 Function key shorted or stuck Replace touch pad or if touch pad is part of the clock, replace the (ERC)= Oven control board

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Unplug unit and take bottom off of it with the screws that go around the outer edge. The turnatanble motor has 2 screws and is removabe from the bottom underneath.

HI thanks for the question. you can by pass the clock so the oven will work without the timer. call a tech near you, and ask them to by pass the timer. if i could get the wiring diagram, i could tell you how . its a simple thing to do. thanks the appliance doc. please rate my answer.thanks

Your problem is due to the "magnetron" arcing to the wave guide within the microwave. Picture someone arc-welding stuff together inside the microwave casing, that's essentially what's happening. It is a fire hazard and you should stop using the microwave immediately. As far as I know, there isn't a recall on that particular model (though there was on another similar Kenmore/Whirlpool model) so if it's out of warranty, you're out of luck.

Unless it's a fan dragging (evidenced by reduced air flow) I would suspect the magnetron is failing.

Even though labor and the other parts are out of warranty, they still cover the magnetron for 10 years.

Their customer service department can help you:
http://www.frigidaire.com/support/support.asp

We're happy to help and we appreciate your thoughtful rating of our answer.

That model number doesn't ring a bell. Is that right? Is it foreign?

Chances are the coupler and/or turntable support will be damaged or warped.

Also on some brands, the "packing" (often a rubber grommet) must be replaced.