Question about Hotpoint REM25SJ Microwave Oven

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Erradic operation of the microwave oven

Greetings, When I turn on the microwave oven it will shut off without completing. The shutoff is generally preceded by flickering in the display panel. Sometimes it will operate to completion, quite bizarre. When I turn off the turntable it still works erradically. I have changed the outlet the unit is plugged in to but that has not made any difference. Does anyone have any suggestions?

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Re: Erradic operation of the microwave oven

Has this unit had the magnetron replaced lately? If so, it may be loose or the RF gasket (mesh screen type washer) may be missing or damaged. If not, the magnetron might be failing. To test this, you can try cooking on the lowest power level (1 or 10%) a few times and see if it fails less often. Otherwise, I would suspect a bad connection or component on the control unit (smart board), which we repair nationwide for only $39.95 postpaid in most cases. We have *critical* safety & disassembly info at our site, which is linked at our listing here on FixYa: Please repost or write if we can help further.

Posted on Jun 08, 2007

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Re: Erradic operation of the microwave oven

There is probably a loose contact in the pc board at the front or alternatively the powersupply in the mwave .canbe a number of diff things sorry i could not b of more help

Posted on Jun 05, 2007

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Erradic operation of the microwave oven

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I have a panasonic microwave oven. It shuts off after running for just a few seconds. It does not flip any circuits. The model # is NN T785SF.

It thinks its overheating, and the (faulty) thermal shutoff is shutting down your unit.
fix: since repair parts for household appliances are unavailable (parts are available for major
appliances only), your fix is to replace the microwave.
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The start button is not working-everything else seems to be fine. There have been some power fluctuations. Any thoughts?

Sorry to read about your problem.
It seems your have a general failure in the power control or switch failure on the unit. Since your unit has power, and things lite. it is more likely you have a control/switch problem,

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.

Microwaves must be serviced by technicians due to the inherent dangers involved in repairing these appliances. Internal capacitors can retain a lethal electrical charge even though the unit is completely unplugged. A microwave radiation leakage test must be performed on the unit following any internal component repair.

I tried to help you. Please help me and Rate/Vote on my response, thanks and good luck

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Dec 31, 2010 | Emerson MW8102SS 1100 Watts Microwave Oven

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I have a 10 year old MH7130XE Whirlpool microwave oven. The oven and key pad both work, and the oven heats just fine. The problem is the oven begins running as soon as you open the door...without pushing...

I'm assuming you mis-typed and meant the oven begins running when you SHUT the door and stops when you OPEN the door. Please tell me this is what you meant! If the microwave oven runs with the door open, UPLUG IT IMMEDIATELY AND DO NOT USE IT!!!

If the oven begins running without pushing the start button then the controller is bad or the Start button is worn out and making contact without pushing it. (Most likely it is your controller.) Generally, it is not worth the cost to replace the controller on a 10 year old microwave. Probably time for a new one.

But if you want, you can call Whirlpool and see what they suggest at 800-253-1301.

If this was helpful, please select YES to the first two RATINGS questions. Good Luck!

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Microwave shuts down after cooking three or four minutes

Your magnetron is overheating and tripping the thermostat, which interrupts power until it cools.

Since it's less than one year old, it should be fully covered under warranty. I'd suggest contacting the manufacturer to get it fixed free.

You can find your nearest Maytag-authorized servicer here.

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

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Turns off after 3 sec

Usually this indicates failure of the magnetron and/or the inverter. Neither is easy to test without specialised HV equipment. Often the cause is operating the oven without anything in it. If this has happened, it will generally be failure of the magnetron.

Replacement of the magnetron is relatively easy (about 15 minutes) and the inverter a little longer but if you do not have the knowledge/skills please do not do it - there are very dangerous (deadly) voltages associated with magnetrons even after they have been switched off.

Cost of magnetrons ranges upwards from USD25 to USD100 (from Panasonic spare parts) and inverters range upwards from USD125. The cost of parts is often the reason microwave ovens are not repaired.


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My microwave heats but shuts off due to the fan not coming on

A little late for a reply; you probably have replaced it by now.

I suspect it shuts down because the fan is no longer turning on and there is probably a thermal shutoff switch near or on the magnetron to prevent the chance of fire.

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Shuts off


Thanks for your inquiry regarding the issues you are experiencing with your microwave. What it sounds like is a possible short internally otherwise it might also be over heating.

How long have you owned your microwave for?

I'll await your reply.

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Operating a microwave oven without a load

In principle no it is not hazardous. In practice however, unless the machine is clean to the point of sterile, small items in the microwave can absorb more energy than they would if a large item was in the machine also. This can produce some damage to the machine. manufacturers generally recommend not running microwaves empty. Why would you want to? If in doubt, just a cup of water would be more than adequate. it is not a good idea to modify a microwave oven in any way. Hope this helps :)

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