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Sharp R-1870 Convection/Microwave Oven Questions & Answers
No matter what time i put in it cuts off in 60 seconds on a sharp
This sounds like a bad damper switch or motor. Double check the shut off time....... see if it's actually 59 seconds..
When you unplug the unit from the wall for 2 minutes then plug it bad in, you should be able to faintly hear a motor run for a few seconds. This is the damper motor running. This will verify that the motor is operating.....
Also, check the thermistor.
Sharp micro counts down 59 seconds and stops
It seems this has been happening over the last few years. I am a retired appliance tech. My 1870 also started the 59 second routine, Also in a motor home. Pure logic. Had to be the board. New board same results. So now I need to run down a parts manual and possibly service manual, and get the damper switch and motor refered to in earlier posts. Changing out the board was fairly simple. Dropping the unit to change out the other components sounds like it will be a tad bit more difficult.
Microwave oven stops after 59 seconds
This
is a problem in one of the damper-related components, either the switch
or motor or the damper door may be binding.
The
damper is a door inside that opens or closes depending on cooking mode.
If the controller senses that the door is not in the right position, it
will shut down the cook cycle.
Sharp-made models stop after
59 seconds.
See the attached sample
drawing for a typical damper assembly.
If a switch is all you
need, we offer a universal type for only $7.50 postpaid which you can
order here.We're
happy to help you with free advice and we'd appreciate your
thoughtful rating of our answer.
How to unlock sharp stove?
Not super familiar with Sharp Microwave ovens Convection or not,
but most microwave ovens can run into at least two reasons that they won't open and both require you to remove the cover over the whole oven - If the door has a push-button to release the door, you could find inside it has popped free of it's pivots and is not lifting up the latches on the door so you can open it, or is has actually snapped that latch. The other thing I have seen more on Panasonic microwave ovens and again moreso on the newer Inverter ovens, is that the latching assembly inside is attached to too thin a piece of metal and the metal actually bends - now your door and it's latching assembly and switches don't line up properly.
In that case you will still need to remove the cover and do your best to realign the switch assembly with the front of the microwave so that the door can click in and out easily.
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