If I set the cooking timer to (say) three minutes, the microwave stops after every 59 seconds, and I have to press the start button to resume the cooking timer. It then stops again after a further 59 seconds and so on until the cooking time has completed.
Check that a "favourite" setting has not been selected. The unit may think that is the time that you want to cook. Im not sure about your model but see if there is any clear or cancel buttons to clear any pre programmed selections. If not, unplug the machine for 15 minutes to reset the controller and try it again.
SOURCE: R957 cooks for 59 seconds
This
is a problem in one of the damper-related components, most likely the
switch, but it may also be the motor or the damper door.
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 models stop after 59 seconds.
See the attached sample photo for a typical damper assembly.
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.
We're happy to help you and we'd appreciate your
thoughtful rating of our answer.
SOURCE: Sharp R-1870 stops at 59 seconds
Wow. I just read something ridiculous!
Well, never mind that, here's your solution:
This
is a common problem in one of the damper-related components, most likely the
switch, but it may also be the motor or the damper door.
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 models stop after
59 seconds.
See the attached sample
photo for a typical damper assembly.
We have the applicable
service manuals for these models and have uploaded it to our site here and here to help you. You will
need the free
Adobe Reader
to view or print it.
If a switch is all you
need, we offer a universal type for only $5 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.
SOURCE: when timer set to cook for any time over one
I have exactly the same problem; always after 59 secs, it stops.
SOURCE: I Have a sharp microwave
That would be a problem in the damper assembly, either a bad switch or motor, or the damper door is jammed or blocked. Consult the attached diagram for general reference. The damper switch is the same as the primary interlock (door) switch.
Its location varies by model, but you'll have to take the outer cover off to find it.
The best place to order Sharp parts is Tritronics or you can call them toll-free at 866-779-5835.
If you only need a switch, you can order a universal type HERE
Also, I quote other similar solution...
I had the same problem. Turned out to be the micro switch and damper motor. I replaced both myself and fixed the problem for less than $40.00. The best advice I got was replace the switch, reconnect the motor and make sure the motor runs through a damper door cycle. It didn't run, even though it showed continuity and had power, so I replaced the motor which solved the problem. The micro switch which is activated by the cam on the damper motor has to be cycled within one minute, or the unit shuts itself off. The damper motor on my model R-1870 is found in the right rear section of the assembly when facing it. You have to remove the unit, and remove the outer casing to get to it. The damper is a simple sheet metal door, activated by the motor, and the switch mounts at the top of the motor and is activated by the same cam that activates the door.
Good luck.
SOURCE: My Sharp R-975 Microwave after settin the timer
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 models stop after
59 seconds.
See the attached sample
drawing for a typical damper assembly.
I'm not sure this is a US model or if parts are still available, so look up Sharp in your country.
We're
happy to help you with free advice and we'd appreciate your
thoughtful rating of our answer.
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