Question about Microwave Ovens
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Posted on Jan 02, 2017
This is usually caused by either a bad door switch, a loose door switch mount, or sometimes a problem on the control panel.
I would suspect the door switch mount has a broken tab allowing the switch to swing down when the door is closed, not allowing it to really be activated.
Also, even though a door switch clicks, it may still be bad inside. Its continuity must be checked.
Switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.
If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk
You can order Sharp parts from Tritronics at http://www.wehaveparts.com
We're happy to help and we appreciate your thoughtful rating of our answer.
Posted on Mar 02, 2008
please do the following checks...
Please rate this solution.Thank you....
Posted on Dec 16, 2008
Assuming your inside light and
turntable come on when you try to microwave, with the symptoms you have,
I would most strongly suspect a bad magnetron or a loose and possibly
corroded connection on the magnetron's terminal.
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.
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.
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'sprobably okay)
The best place to order parts for this brand is Encompass (formerly Tritronics).
Or you can call them toll-free at 866-779-5835.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Feb 08, 2009
SOURCE: Sharp Microwave stopped heating
If it is working but not heating, then test the high voltage
capacitor,the rectifier diode.or the magnetron. If all this are fine,
test the control board.If turntable is not running check also the door
The diodeand capacitors can be tested. The capacitor must be allowed discharge before testing, or you risk to get electrocuted, evenif power is off.Capacitors can get discharged by shorting their two contacts.
Before replacing the magnetron test also the control board.
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.
You can also order from MicrowaveSvc , they also provide parts.
Posted on May 16, 2009
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It sounds like the magnetron may have
either failed or is not being supplied with the extremely high
voltage required to run it.
Make sure the !!!!capacitor is discharged!!!!! before attempting any sort of repair.
Check the door interlock switches first then the high voltage diode with either an AVO model 8 on high resistance range for short circuit, the capacitor can fail and go short circuit, the feed fuse on the primary of the high voltage transformer and then finally, the magnetron is best checked by substitution.
Hope that helps
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