Question about Whirlpool MH7140XF Microwave Oven
Posted by Anonymous on
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Almost certainly, the component called the "magnetron" has died. This is the valve (tube in the US) which actually generates the microwaves. The loud humming is the transformer that supplies the magnetron being overloaded and/or the magnetron itself. If the rest of the appliance is OK and not too old, the magnetron can be replaced. If you aren't familiar with these appliances, you *must* get this done by someone who understands the dangers of messing with them - if you get it wrong, they can bite! In some countries, only qualified engineers can buy the spare parts. In the UK, the part costs around £40 - £80, depending on the model. If the appliance is more than around three years old, it may be a false economy to repair it as other parts may fail soon after the repair.
Posted on Sep 24, 2007
SOURCE: Humming noise in cook mode.
With the symptoms you
have, I would most strongly suspect a shorted high voltage rectifier
diode or a bad magnetron, or a loose and possibly corroded connection on the magnetron's terminal.
The diode is a fairly cheap fix, and the mag will cost more.
If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.
There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.
At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.
If you don't find yours, or if you want to look at it without disassembling the oven, you can download it here.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
Here are some links you or someone you know can use for test help, but read their safety warnings first:
(if it's not shorted or burned, it's probably okay)
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Jan 03, 2009
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
Tips for a great answer:
Feb 03, 2016 | Whirlpool Accuwave Microwave Oven
Apr 02, 2011 | Whirlpool MH8150XJ Microwave Oven
Jul 28, 2010 | Whirlpool MH7140XF Microwave Oven
Dec 19, 2009 | Whirlpool MH7135XE Microwave Oven
Dec 10, 2009 | Sharp R-530ES Microwave Oven
Aug 18, 2009 | Whirlpool MH7140XF Microwave Oven
Aug 06, 2009 | Whirlpool Microwave Ovens
Jan 01, 2009 | Whirlpool GH7145XF Microwave Oven
Dec 18, 2008 | GE Spacemaker JVM1640SJ Microwave Oven
Nov 20, 2008 | Goldstar MV-1501 Microwave Oven
62 people viewed this question
Usually answered in minutes!