Question about Sharp R-1870 Convection/Microwave Oven
When I close the door it starts to run but not heat. Cannot shot off without opening door. START|TOUCH ON button does not function. Unplugged unit thinking it may reset but no change. Reset clock ok but no change.
This is usually caused by either a bad upper door switch, a loose upper 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.
Sometimes it's a lot to just secure the switch with a drop of hot glue instead of replacing the latch head.
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:.
You can probably find exploded views and order parts by entering your model number here at the Sears parts site.
The best place to order Sharp parts is Tritronics.
If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Aug 18, 2008
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Posted on Jan 02, 2017
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