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Microwave no longer heats food. 7 years old. Is it worth fixing or replacing. Do not have manual for it how can I look at one online? Model FMT144G1W3

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5 Suggested Answers

SOURCE: Microwave does not heat

Just had the same experience with the identical model. Removed the cover (a challenge because of the security screws), revealing valuable troubleshooting directions intended for an experienced technician. However, I think the info is well within the reach of a typical DIY person, does not require any dangerous power-on conditions. However, make sure that you discharge the HV capacitor before trouble shooting. In my case, it appears that the HV diode is open, have ordered a replacement on the internet for $3.18, easy to replace. Hope it works. Good luck.

Posted on Jul 14, 2007

sharcnet
  • 2124 Answers

SOURCE: Maytag Microwave model#MMV5186AA

Typically, no heating of food, indicates a bad Magnetron (tube) or associated components. The oven can be repaired. Magnetrons are not hard to replace and can be ordered online through MCM electronics www.mcmelectronics .

However, due to the dangers of high-voltage within the unit, I would recommend taking the unit to a repair center.

Look in the manual to see what the warranty says. See if there is any information regarding the magnetron or parts. You may be able to get it repaired for free parts, less labor.

Please let me know if I can be of further assistance to you.

Good Luck,

- Jim

Posted on Mar 20, 2008

  • 2468 Answers

SOURCE: 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

Posted on Jul 28, 2010

jsrock516
  • 5911 Answers

SOURCE: I have a GE Spacemaker

If everything works, but the microwave oven does not heat, this is commonly caused by a failed magnetron. The magnetron is essentially, the heart of the oven. This is what produces the RF energy that heats your food.
Here's what you need to determine whether or not its worth fixing:
1. You will need to uninstall the oven from over the range in order to replace the part (you will need to do this anyway, if you decide to buy a replacement oven).
2. You will need to ensure the oven is UNPLUGGED before servicing anything inside the cabinet. You will need to remove the exterior case in order to access the magnetron. There are several websites that you can use that illustrate how the oven is assembled:
searspartsdirect.com pcappliancerepair.com appliancepartspros.com
If you've never repaired an appliance on your own before, a microwave oven is usually not a recommended appliance to start with. Some models can be rather involved in taking apart.
3, The magnetron replacement part number for the model you have listed is WB27X10305. The average cost is about $80. NOTE: I found the part listed for the best price at appliancepartspros.com at a cost of $76.
You need to decide whether or not $80 and the amount of labor involved is worth the effort as opposed to replacing the entire oven at a higher cost and less labor (other than the installation). Review the parts illustrations at the recommended websites to see if this is something that you may be able easily take apart and reassemble.
If you have any questions, please post back and let me know. I hope you find this information helpful
CAUTION: DO NOT operate a microwave oven with the exterior cover off. The voltage inside the High Voltage network where the magnetron is installed can exceed 3,000 volts.

Posted on Aug 17, 2010

Testimonial: "Hi jsrock516 - thanks for your expert information. I don't think this is something we can fix on our own and as you said probably cheaper to replace. "

heatman101
  • 43501 Answers

SOURCE: Whirlpool MH7140XFQ-1 microwave no longer heating

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101
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Posted on Sep 30, 2010

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Look in the manual to see what the warranty says. See if there is any information regarding the magnetron or parts. You may be able to get it repaired for free parts, less labor.

Please let me know if I can be of further assistance to you.

Good Luck,

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