SHarp R-9H84B Microwave with Convection

Turn table does not turn , sharp convection microwave R-9H84B
Can I fix this myself? or do I need to have it serviced?

Here is the parts page for your unit with an exploded view and parts list

http://www.searspartsdirect.com/partsdirect/part-model/Sharp-Parts/Microwave-Parts/Model-R-9H84B/0958/0123245/P0050209/00001 It is possible the switch is bad the look at part number 1-6 hope this helps.

this is the thermistor is time to replace,if the fan of the oven is working,also couse this problem.

Great news

That model had 900 watts of microwave power output, and the convection outpout was 1450 watts.

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

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

They aren't cheap, but I found them here:

http://www.repairclinic.com/PartDetail/Glass-Tray-Drive-Coupling/1266724

I was looking because after 15 years, my drive coupling cracked out where it connects to the turn table motor. Getting it out isn't that difficult - just remember to unplug the oven before you work on it. If the old coupler won't come out with gentle and even prying, flip the oven upside down - there is a small door on the bottom help shut with a single philips (+) screw which will give you access to the motor. Remove the two philips screws and lift the motor out and then use your screw driver to gently encourage the coupler out. I found removing the motor was the easiest way to install the new coupler - install the coupler then the motor while holding the coupler in upside down. I have the model with the door opening like a conventional oven door and it will not want to stay open for you while the oven is upside down. Either have some one hold it open while you have an arm in there or be prepared to have your arm squeezed a bit.

Cheers,
David

It's almost certainly a bad turntable motor.

The part number was RMOTDA079WRE0 but it is listed as no longer available.

In some cases, older microwaves are available locally at repair shops or on Craig's List.

If you want to keep your eyes open, this same motor was used in the following Sharp models:

R9A20
R9A50
R9H11
R9H60
R9H66
R9H71
R9H73
R9H76
R9H80
R9H81
R9H81B
R9H83
R9H84
R9H84B
R9H91
R9H91B
R9H93
R9H94
R9H94B

Good luck.

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

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 this the unit with the door that swings down like a conventional oven?? I think it is. This sounds like a door switch but could be a magnetron or cook relay on the control PCB.