Question about Microwave Ovens
Oven will not operate on standard usage - i.e. heating to number of minutes either on high or reheat, machine runs creating loud noise and when cycle completed, item is still cold.
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Posted on Jan 02, 2017
This model uses an inverter to produce high voltage instead of a convential transformer system. While an inverter (switched-mode power supply) is more efficient from a power consumption standpoint, it is more complex, thus more statistically prone to fail. These should only be examined and worked on by someone who has the necessary technical qualifications. Seriously. Often the machine-soldered connections in a microwave inverter are too weak, so they eventually fail, especially if heat is high in the area. They sometimes fail catastrophically. When not catastrophically damaged, you may hear clicking or squealing and may smell an electrical odor, which is sometimes obscured by the cooling fan. Some manufacturers do not encourage or assist technicians to repair microwave inverters. Most offer the inverter as a whole assembly. But sometimes that is actually cheaper than the time and labor required to fix the old one. If a technician is willing and able to troubleshoot and repair the inverter to component level, it will may be expensive, but may be worth it, especially if he or she will resolder and reinforce connections as needed as part of a thorough repair. That could easily make your inverter beter than a new one! You might be able to get some verbal estimates if you call Panasonic-authorized repair shops and ask then specifically about inverter repair and inverter replacement costs for your model number.
Posted on Dec 23, 2006
The symptoms you are describing are typical of a magnetron that has gone bad. Continuing to attempt to use the oven in its current condition can cause further damage. So, I would recommend not using it. Microwave ovens are considered dangerous and repairs should not be attempted by anyone that is not electronic saavy. The High Voltage Network inside the oven has voltage potentials of 14,000 volts and higher. If you feel this is something you wish to attempt, the Magnetron part number is 1156751 and costs approx. $158. Keep in mind, if the magnetron has been arcing and making a burning smell you may have burned the protective coating that lines the walls of the waveguide. If the waveguide is damaged it is not repairable. I do not know if this is a replaceable item on your model microwave. Double check your warranty information and/or owner's manual. In many cases the magnetron is warranted for several years beyond the limited warranty that comes with most appliances. Post back with comments and let me know if you want me to assist you further. In addition, if you provide me with your EXACT model number (located along the door opening) I can narrow down parts a little better. I know this all sounds discouraging, but I do hope I have been able to help you.
Posted on Jan 15, 2008
SOURCE: reheating doesn't work
The magnetron may be faulty. When measured there should be no reading between one of the terminals and the outer case of the magnetron. Also check High Voltage Fuse( Normally a red wire with a white plastic capsule in the centre) and the High Voltage Diode(Situated between earth and High Voltage Cap). Be sure to unplug from Mains before working on the unit.Good Luck, JUS004
Posted on Feb 26, 2008
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
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