Question about Samsung SMH7174BC Microwave Oven

Not heating My microwave is not heating at all. Is there a fuse possibly blown and if so where is it located at?

2 more comments
lunchpie Dec 24, 2007

mircowave not heating mircowave not heating
Anonymous Apr 09, 2008

I have a Samsung MR5492W 1000 Watt. My wife put a cup of coffee in to heat and the cup must have had some kind of metalic paint. There was a loud pop. Now everything works except it doesn't heat.
Anonymous Apr 14, 2008

My microwave is not heating and the table is not turning, Is there a fuse that need to be replaced.
Anonymous Jun 01, 2008

not heating not heating

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Anonymous

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MY MICROWAVE IS NOT HEATING THE MODEL# MR757T

Posted on Oct 06, 2007

William Miller

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Samsung Master
9,179 Answers

Normally the fuse(s) in a microwave will kill all power to the unit and render it "dead", as opposed to just limiting operation. The most common causes for it to run without heating are a bad door switch, a bad relay or connection on the control circuit, a bad connection on the "FA" magnetron terminal, a defective high-voltage transformer, a defective magnetron or a shorted high-voltage diode. One thing you could do is to try gently pushing down on the door handle or the door about 1/32 of an inch or so and se if it heats then. That would indicate door switch trouble or alignment. This test can easily give you a false "positive", though. I hesistate to offer any more specific instructions unless someone is an experienced and informed DIYer or more. Even still, I would want to steer a person toward my Web site, which contains important safety info and free DIY tips. But I cannot, since such a referral would violate the terms of this site.

Posted on Oct 07, 2006

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Microwave has no heat but everything else is running

Most microwave ovens have a High voltage fuse for protection of the magnetron. This fuse has possibly blown. This fuse is normally in the form of a cartridge with attached wiring and is located near the magnetron. I strongly recommend that you have a qualified technician investigate this fault as there are lethal voltages associated with the magnetron.

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HI. in most cases, this will lead to a failed Heating device(magnetron tube).It would be wise to check the Magnetron cutoff fuse to be sure of its integrity. if the fuse is blown, simply replace it. if the fuse continues to show continuity, replace the magnetron.

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HI. in most cases, this will lead to a failed Heating device(magnetron tube).It would be wise to check the Magnetron cutoff fuse to be sure of its integrity. if the fuse is blown, simply replace it. if the fuse continues to show continuity, replace the magnetron.

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