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Unit will no longer heat. - Microwave Ovens

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  • bklandes Oct 14, 2010

    This was not a microwave oven! It is a Waffle Iron. No the suggestions did not help.

  • bklandes Oct 14, 2010

    This is a waffle iron not a microwave.

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Does the unit turn on, and try to heat? If it does, there's the possibility that you can have a bad magnetron, but a lot of things can be causing it not to heat. Here is a site that explains how to test the most likely components that may be causing the problem:
http://www.applianceaid.com/component.html
Also, here is a site that might have your make and model of microwave, and it has helpful diagrams and parts lists if they have your model:
http://www.appliancepartspros.com/
Just enter the model number in the search box, and if they have your model, it will come up.
Not knowing the make and model number, I can only provide general assistance, but hope this helps.

.

Posted on Oct 11, 2010

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1 Answer

My oster microwave is not heating. it lights up, and it spins but no heat


The unit that makes microwaves no longer working. It has a separate fuse for it. There is a hi voltage transformer there too, It may be bad

Jul 28, 2016 | Oster Microwave Ovens

1 Answer

Unit does not heat


follow this steps.and fix it. God bless you
  1. Check the power diode This electronic component is responsible for transmitting current in one direction. If the diode becomes defective it will cause your microwave to not heat. Test the diode and replace it if necessary.
  2. High voltage capacitor Responsible for storing electricity, this part is a key component in any microwave. Remove, discharge, and test the capacitor to determine if it requires replacement.
  3. Damaged magnetron Responsible for generating waves and producing heat. When your microwave is no longer heating properly, replacement will be required.
  4. Thermal Cutoffs Examine the thermal cutoffs on both the magnetron and the oven itself. Take off one of the leads and using a volt-ohm meter on RX1, check the terminals. If you get a result other than zero, replace the thermal cutoffs.

Dec 09, 2013 | Microwave Ovens

1 Answer

My microwave won't heat


The real clue here is strangely enough the table not turning.

All units have a switch in the side (usually the right side) of the cabinet--when door is opened it allows the unit to work but will not heat or the table (usually both) will not work.

It has to be got at from the inside of the unit--little plastic holder with the switch which looks like a leaf switch.

What I have seen several times (including a unit I own) is that from countless opening and closing the door the holder may break or even melt and the contacts on the switch no longer are in position to work when door is open.

The purpose of such a switch is simple---it prevents the unit from being used if the door is OPEN.

Not a hard or expensive repair

Dec 06, 2012 | GE Profile Spacemaker XL 1800 36"...

1 Answer

Whirlpool model number MH7140XFB no longer heats


you either need a new h.v. capacitor or h.v. diode in the magnetron circuitry if you cant hear it cycle when it runs as in a low pitched hummmm when its drawing current to operate the magnetron tube, each part runs about $30 to $45 each,normally its the h.v. capacitor though

Jul 28, 2010 | Whirlpool MH7140XF Microwave Oven

1 Answer

Do not heat any longer, lights, clock and fan work


In situtions such as these it can be considered that the Magnatron has passed on. Co0t of repair often exceeds the value of replacement.
No fuse controls the magnatron separately from the rest of the unit so deem it dead

With the availability of good second hand models on the market via pawn shops like Cash Converters etc one can find a very good unit with 30 day warranty for $50-100 and its already been checked over for defects

Please rate my help++++Thanks for using FIXYA

May 08, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

My microwave no longer heats anything


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.

(((The fuse is located inside the unit along side the magnetron)))

Aug 29, 2009 | Microwave Ovens

1 Answer

I have a GE microwave, model JVM 3670 BF03. It is an above the range unit. The unit still has power, the clock, turnstyle and fan work fine, but it no longer heats food.


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.

(((The fuse is located inside the unit along side the magnetron)))

Aug 18, 2009 | Microwave Ovens

1 Answer

Microwave want heat any longer. Everthing else is


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.

(((The fuse is located inside the unit along side the magnetron)))

Jul 31, 2009 | Microwave Ovens

1 Answer

Quit heating


This is a sure sign that the Magnatron has burnt out and needs replaced ( This is what cooks the food!) Replace magnatron in oven unit and all should work well!
Please rate my response!
THANK YOU!

Jan 11, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Not heating


If the maggie went it's very plasible that it took out the Cap and/or HV diode with it.

Nov 21, 2007 | GE JEB1095 Convection/Microwave Oven

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