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My Tappan OTR microwave, model TMV151FB, runs but does not heat anything.

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Sorry to read about your problem, I hope this helps you out.
Here is a small list, of things that could be wrong with your unit

  • Bad interlocks switches or door misalignment causing fuses to blow or no operation when the start button is pressed. Locate and replace defective switches and/or realign door.

  • Arcing in oven chamber: clean oven chamber and waveguide thoroughly. Replace carbonized or damaged waveguide cover. Smooth rough metal edges. Touch up the interior paint.
  • Blown fuse due to power surge or old age: Replace fuse. On rare occasions, the main fuse may even be intermittent causing very strange symptoms.
  • An MOV, probably on the controller, may have shorted due to a power surge blowing the controller fuse. Remove remains of MOV, replace fuse and test, replace MOV for future surge protection.
  • Erratic touchpad operation due to spill - let touchpad dry out for a week.
  • Bugs in the works - the controller circuit board is a nice warm safe cozy place to raise a family.....
Careless troubleshooting of a microwave oven can result in death or worse. Experienced technicians have met their maker as a result of a momentary lapse of judgement while testing an oven with the cover removed. Microwave ovens are without a doubt, the most deadly type of consumer electronic equipment in wide spread use.

The power supplies for even the smallest microwave ovens operate at extremely lethal voltage and current levels. Do not attempt to troubleshoot, repair, or modify such equipment without understanding and following ALL of the relevant safety guidelines for high voltage and/or line connected electrical and electronic systems.

I will not be responsible for damage to equipment, your ego, county wide power outages, spontaneously generated mini (or larger) black holes, planetary disruptions, or personal injury or worse that may result from the use of this material.


I tried to help you. Please help me and Rate/Vote on my response. We take the time to answer your question. take the time to rate us.Thanks and good luck

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Posted on Dec 31, 2010

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See my help file on door switches: http://031d26d.namesecurehost.com/mwd/doorsw.txt

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http://www.microwavedisplay.com/tmv151f_parts.pdf

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