Question about Microwave Ovens
The magnetron is overheating and causing
the magnetron thermostat to open.
Then when it cools, it closes the circuit and allows power through again.
This is usually caused when the internal cooling fan is not running or by a magnetron that is failing.
When I say internal cooling fan, I do not mean the hood vent exhaust fan which you can turn on and off manually.
I'm instead talking about the internal fan which comes on automatically whenever you microwave.
It is vital that the cooling fan runs, or the magnetron will be
It may also be a clogged exhaust duct or filter. Grease filters should be cleaned regularly and charcoal filters should be replaced (not cleaned) every 6-12 months.
You can refer to your owner;s manual for that info.
You can download most Maytag / Whirlpool / Tappan owner's manuals and installation instructions here.
If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Dec 13, 2008
I had the message -SE- showing up on my TMV151F. I opened up the control panel and made sure all the connectors were secure. I noticed the red connector was not in all the way. I also noticed that the grounding wire behind the mini-manual was touching the back part of the board so I separated it. Not sure if either of these actions fixed it or if by some miracle it fixed itself. It is working fine now.
Posted on May 14, 2009
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