Panasonic Microwave Ovens - Page 4 - Recent Questions, Troubleshooting & Support

Replace the faulty door switch.

Prepare yourself for an expensive repair. If it is the older style with a large mains transformer, it may be just a blown fuse but the newer switching power modules will have serious issues.

maybe it needs a new switch??

That is an odd series of events. Microwave ovens don't have a reset button but they do have a slow blow fuse. It is no point replacing it because you have a more serious short circuit that tripped the breaker immediately. You can't work on Microwave ovens yourself as they are so dangerous inside. Also the case is fixed with special security screws. Panasonic are pretty much the best in the business and I have used many in a commercial kitchens environment. The old ones are much better made than any new one these days, so it is well worth getting it repaired. Pull it out and take in. https://www.google.com/search?safe=off&rlz=1C1QJDB_enCA643CA644&sxsrf=ALeKk03OWWscqQi9U5hA-vDA8sHRuHMF2A%3A1615660600337&ei=OAZNYKfnE--3ggeCxZbQCw&q=panasonic+microwave+service+near+me ..

1. Unplug the microwave from electrical power.
2. Remove all the screws holding the outer wrapper in place, back and sides (note which screws fit in which locations).
3. From the rear lift the wrapper slightly and it should slip back to release tabs/flaps located along the front. (A putty knife or flat blade screwdriver can help.)
4. Components inside have sharp edges and there may be considerable residual electrical power retained that can cause injury - proceed with caution!
5. Inside the component compartment (on the right hand side) and just behind the control panel and door latch assembly you will see the oven cavity light assembly. Check for a bad light and replace as needed.
6. Exercise caution during reassembly to confirm all wires are in their proper location and nothing is pinched, trapped or otherwise going to cause problems upon reassembly.
7. Restore electrical power and check operation.

Probable magnetron or control board failure

Either the magnetron, power board or both have failed.

The directions to access the charcoal filter are given in the basic operation manual on page 25 (page 27 of the PDF). First tilt the vent grille louver above the door of the microwave down towards yourself. (The vent grille goes across the entire width of the microwave). Next remove three screws, one on each side and one in the center top of the vent grille. Remove the vent grille. Place your finger under the bottom of the standard charcoal filter in the center of this filter. Use that finger to slide the filter forward. Since the replacement filter gets secured with two screws, remove the screws if you can't slide the filter forward. This manual is available on the Panasonic support site: https://shop.panasonic.com/support-only/NN-P295SF.html . The current link to the manual is ftp://ftp.panasonic.com/microwaveoven/om/nn-p295bf_mul_om.pdf . I hope this helps. Cindy Wells

The transformer is probably drawing too much power by a low resistance or a short somewhere on the secondary's side. The components on that side include the HV cap, the HV diode, and the magnetron all of which should be tested. I would try the cap first but make sure you discharge it before operating on it.

This is the closest for free https://www.panasonic.com/ca/support/discontinued/home-appliances/nn-cd989s.html This says it has it but no link http://www.electronic-circuitry.com/e/action/ShowInfo.php?classid=61&id=82044 Service manual for $7.99 https://www.manuals-in-pdf.com/download-NE9930C-PANASONIC-p-1424774.html

Purchase a replacement lamp from somewhere like espares or the like. It should be a standard E17 or SES 20Watt bulb.

I don't think the door film is part of the shielding - mostly the shielding is a sheet of perforated metal sandwiched in the door and covering the glass window. I think the glass film is just there to make it seem dark and mysterious until there is something going on inside. Try shining a flashlight through the door and see if there is in fact a perforated sheet... Microwave energy leakage meters are commercially available though they are less used these days as users have increased confidence. When a new microwave is obtained it is a good idea to accurately time the boiling of a measured quantity of water as a performance benchmark and then repeat the experiment at intervals - any significant extension of the time taken signals it is time for maintenance because the lost energy could be due to leakage...

This looks like it. It is a standard Philips compact florescent. You can get them at home Depot, or here https://www.repairclinic.com/PartDetail/Light-Bulb/FFV3420085S/4546044 ..

Past time to replace it

You might find something in this useful... https://www.fixya.com/support/t27265720-hard_reset_panasonic_inverter_microwave

Hello Two options to try: 1) Press the Clock / Timer button 3 times 2) Unplug, wait a minute, then re-plug to power up with the factory settings. You will need to reset your clock and any favourite settings. This should work with all Panasonic Microwave models. Good luck

replace main board

Inner layer of a microwave door is part of the metal cage that keeps the microwave energy inside and prevents potentially dangerous energy leaks. To clean the inside of the glass the door will need to be dismantled - some doors dismantle easily and some don't and sometimes the door must be removed in order to dismantle... Some doors remove easily and some don't... It is very important the door is reassembled correctly and then tested for energy leakage.

Is there a quick fix to error h97?

This will be either a faulty door interlock switch or High voltage component. You will need to remove the outer cover after first disconnecting power. Discharge the high voltage capactitor!
Check the door switches are operating correctly if so move on to the high voltage components starting with the transformer