At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
Locked microwave My cousins came over yesterday and it seem that my microwave has coincidentally decided to become locked. It's a Sharp Carousel R-4A96 microwave oven made in 1994 (yeah, I know it's old, but it works).
I should have been more specific when I said "locked." I mean whenever I press a button it displays "Lock" on the screen. I don't mean the actual door is locked.
I should have been more specific when I said "locked." I mean whenever I press a button it displays "Lock" on the screen. I don't mean the actual door is locked.
You can't post conmments that contain an email address.
If it opens and closes OK then it's a sticky censor in switch. Try a tiny squirt of WD40in mechanism.If it opens and closes OK then it's a sticky censor in switch. Try a tiny squirt of WD40in mechanism.
You can't post conmments that contain an email address.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
There are a couple of safety thermostats in the oven to shut down power if something overheats. One is on the magnetron tube (the microwave source), the other is on the cooking cavity. These sometimes go bad. There's also a power line fuse that may have failed, or become loose in its mounting clips. These can be tested with an ohmmeter; they should all measure very close to zero ohms if they're good.
Another possibility is that the control circuit board in the oven may have failed. I have worked on several Sharp ovens where the power transformer for the board has gone bad for no good reason. If the board goes bad the oven may appear to be dead as well.
Microwave servicing is best left to professionals. If you're thinking of keeping this one, take it to a service shop (or call for home service) and get an estimate. Then decide whether to repair or replace.
Hope this has helped a little. Thanks for using Fixya!
Is it totally dead? No display? Or just does not cook? If it made an unusual noise before it 'died' something probably shorted out.... You need an ohm meter to troubleshoot. If the fuse is open, switches and HV circuit need to be checked before replacing fuse. Sometimes on the convection Microwaves (not just Sharp) the fuse will 'rust' and open rather than blow. Or the fuse holder can over heat and fail.
I should have been more specific when I said "locked." I mean whenever I press a button it displays "Lock" on the screen. I don't mean the actual door is locked.
×