Timer just goes off when try to start microwave cooking.

William Miller

• 9179 Answers
• Posted on Aug 18, 2008

SOURCE: I have the Panasonic "The

This is usually caused by either a bad door switch, a loose door switch mount, or occasionally a problem on the control panel.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door 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.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

If you or someone you know 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:.

If the digital programmer circuit / controller does not get a feedback signal from the inverter for a period of 3 seconds, the controller will stop the cook cycle.

In this case, it's probably happening because it;'s not cooking due to a switch problem.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William Miller

• 9179 Answers
• Posted on Jan 09, 2009

SOURCE: Setting time on Panasonic NN-CD748B microwave

Panasonic's UK site is here and you can choose Support, then search for spares, servicers, downloads and contact info.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

SOURCE: microwave wont start but timer counts 3 secs and shuts off

Check the door latch mechanism the black nylon door catch may be broken.

SOURCE: Is there an internal fuse?

there is a fuse, but if this was blown nothing would work, sounds like a capacitor on the control board,just replace the board