Question about Whirlpool WMH1162XV Microwave Oven
WMH 1162X VS -1 (watts unknown) Builder purchased Feb 09; I bought with house 8/09. Have only used appliance 5 months. Turntable turns, but there is no heat to warm or cook food. "Replace filter" notice appeared few weeks back. Given no real age of microwave, questioned need and did not do this. Two metal filters under the microwave have no grease or other visible soil. Are we talking about removing screws, and replacing the carbon filter at the top of the microwave? Surely not. After 5 months' gentle use? Perhaps these two issues are not even related; i.e. filter ... no heat. Turned microwave breaker switch off at fuse box, and on after 30 seconds. Tried the PROGRAM button on the appliance. .... "reset" the non-replaced filter. Saw nothing about temperature within the Program menus. ANYWAY ... TURNTABLE TURNS, BUT THERE IS NO HEAT. What do you suggest? Thanks.
If the oven is set up to vent outside, then the metal mesh grease filters are used, and they should be cleaned in warm soapy water whenever they look greasy or dirty.
If the oven is set up to recirculate, then the charcoal filter is used, and it must be replaced (not cleaned) every 6-12 months, depending on use.
This model does not have a separate cooling fan like most other models. It replies on the vent fan for magnetron cooling, so if the filter(s) gets too dirty, it can reduce the cooling air flow, which can allow the magnetron to overheat and be destroyed.
I would need to know a little more to help narrow down the "no heat" problem.
If the cooling fan, turntable, and inside light all come on when you press "Start" to cook, then I would ask if you here a "thump" when you press "Start."
If so, then the high voltage section is getting energized. If not, then it may be the cook relay on the control board, which I can affordably repair.
The support page for your oven is here, and it has manuals and part lists you can download.
For more free DIY and other help & advice, feel free to contact me with your full model number and FCC ID number from the tag on your oven.
William E. Miller, AS-EET
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"
Posted on Mar 16, 2017
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Posted on Jan 02, 2017
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
SOURCE: GH7145XFB-1 not heating properly
Generally, the most common causes of a failure to heat are:
- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose conneciton on the control unit circuit board
- bad magnetron or other high voltage part
If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk
Posted on Nov 17, 2007
I suspect the magnetron or high voltage transformer, and either part's cost or labor would probably be about the same as the cost of a new comparable unit.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Aug 18, 2008
you may have gotten a power surge and that can cause some funny things to happen, 1st is there power to the oven, 2nd if so there may be an internal fuse protector built in to the oven, check with the manual for anything of that sort listed. if not you may have to take it in and have it repaired by a pro. there is a lot of voltage in these ovens and unless you know what you are doing a person could get hurt
Posted on Jan 03, 2009
Test the high voltage capacitor,
the rectifier diode.or the magnetron.
The diode and capacitors can br tested. The capacitor must be allowed discharge before testing, or you risk to get electrocuted, even if power is off. Capacitors can get discharged by shorting their two contacts.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.
All locations, and description of this parts can be located using the diagram here: Counter top.
Parts must be tested to find out what is wrong.
Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.
Regarding parts, contact the seller here to purchase parts.
Posted on May 21, 2009
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