Question about Electrolux Over-the-Range Microwave

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Mw will not heat

If the magnetron tube went out,would a fuse blow or all power would go out?

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Usually if MAG is RF dead the unit will function but not heat...

Posted on Mar 07, 2009

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2 Answers

My lg ms3949cs microwave tripping the breaker when I press start button but was working before.Please help


More than likely the klystron tube is defective, that draws a lot of current. Best path here is a new MW

Oct 18, 2016 | LG Microwave Ovens

3 Answers

Fuse blowing...door switches OK


Yes, as DER says, you should unplug from AC and discharge the HV capacitor before before getting into any MW repair. In the old days we'd just crowbar the cap with a screwdriver (be sure the handle is insulated!). Nowadays manufacturers recommend discharging through a resistor, which results in much less spark.

Once you've confirmed a hard fault exists by replacing and blowing another fuse, there are a few simple things you can look for. A failed HV diode is usually accompanied by a very obvious burn odor. If the magnetron filament shorts to case, you will read low (<1-ohm) resistance between case and one of the filament terminals. Sometimes a sharp eye, ohm meter and wiring diagram will lead you to find a unique problem (pinched wire, loose screw in the works, etc).

Disconnect filament terminals from transformer to eliminate possibility that the transformer is the source of short. Don't be fooled by low filament resistance between the two terminals. Some good magnetrons will read ZERO ohms!

With the exception of fuse and HV diode, these parts are generally expensive compared to the cost of a new MW oven. Prices on magnetrons vary quite a bit though, so it's worth looking online or calling your parts store. Bad panel? This MW is almost certainly doomed.

You can't really afford to replace parts (even if you do the work yourself) without a highly certain diagnosis. Certainty is hard to come by, especially if the fail takes a while to occur or is intermittent,

Nonetheless, if you feel certain that you have found the defective part and have a sense of adventure, you might be able to fix it.

Jun 20, 2016 | Microwave Ovens

1 Answer

How to fix microwave with bang, flash


That was the magnetron tube breaking. Too expensive to fix. Better to go and buy a new microwave.

Feb 04, 2013 | DeLonghi MW 535 Microwave Oven

1 Answer

Amana MVH210W keeps blowing fuse


The magnetron is more than likely the problem, or the inverter board if oven is 7 years old or less. If you have a digital meter you can do a rough test on the magnetron, unplug microwave, set meter to ohms, disconnect one wire from magnetron and put the test leads across too points, if reading is .2ohms or less it is good, but if the test shows infinity or open the magnetron is bad, keep in mind it may have a short making the reading misleading.

Jun 04, 2012 | Amana Microwave Ovens

2 Answers

MAIN OVEN IS NOT HEATING UP


1. Check power supply
2. Check male plug for possible damage
3. Check thermal fuse for possible damage
4. If magnetron is damaged, replace the unit

May 20, 2011 | Microwave Ovens

1 Answer

Its runs but no heat.


It is usually the magnetron tube that fails which then blows an inner-cabinet fuse. The world seems full of bad Asian made magnetrons that fail prematurely due to air infiltrated internal vacuums from leaking metal to glass seals. It will probably cost more in parts and labor to repair than a new unit. A well made magnetron should gradually lose output power over time (years), not just quit. Hope this helps!

Apr 06, 2010 | GE XL1800 1100 Watts Microwave Oven

1 Answer

Microwave Spacesaver #JUM 2050BH001not heating


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)))...

Sep 27, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Neff microwave oven not heating


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)))

Sep 22, 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 runs but does not blow heat


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)))....

Oct 03, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

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