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Noise making a popping noise and is not heating

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Most likely cause - high voltage rectifier failure. Many other less likely causes.

Posted on May 11, 2014

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1 Answer

Frigidaire microwave popped and know it wont heat and makes a strang noise


The magnetron is the likely problem, especially when one of the classic signs is a popping sound.

Apr 25, 2012 | Microwave Ovens

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I have a whirlpool GH4155XPS-3 microwave. It has stopped cooking. Lights and turntable turn on but will not heat. It makes a poping noise every now and then, but not always and also makes louder noise than...


The magnetron has become defective, especially when it is followed by popping noises and is laboring are classic signs of failure. The other two components that should be checked are the high voltage capacitor and diode, but considering the repairs needed it would be cheaper to replace.

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Started flashing and making popping noises, but still heated ok. Then stopprdheating and just makes a loud buzzing noise


The magnetron is most likely the problem, it heats the food and is the heart of the of the microwave oven, if it was followed by unusual odor more noticeable when you open the door that would confirm it, but that is not always the case. The cost to repair would exceed the cost of a new one

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hIi would return this should be under warranty

Jan 22, 2010 | Microwave Ovens

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My goldstar above the stove microwave popped and now won't heat. Everything else on the unit still works. Is this a problem that can be repaired? Thanks.


Did it make a loud pop like a firecracker?
Sounds like the High Voltage Diode shorted out and it probably is making a low or loud growling noise now..... ???

Sep 11, 2009 | Microwave Ovens

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Can't explain the popping, but the fan has a heat sensor that will turn it on when it gets to a factory set temperature.

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Ge spacemaker xl 1800 - no heat


HI, the loud popping noise was the Magnetron tube. this is the main heating device. the noise filter is also damaged and, should be replaced as well.

In conclusion, replacing the Magnetron tube and noise filter will fix this unit.

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It's most likely the relay for the magnetron malfunctioning. It'll need professional service.

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