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Questions & Answers
Sharp R-1874 shuts off after 59 seconds
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.
on Jan 14, 2018
Convection oven shuts off after a minute when trying to bake. Does this during Compubake also.. Does not preheat
Possibly a bad oven temp sensor. If the uinit doesnt read a temperature it will shut down to prevent a fire or over heating. The temp sensor is a thermister A temperature variable resistor that changes value as the temp changes. so If the main board doesnt get a response within a vertain resistance range it shuts things down. Sometimes since those parts are in the actual cooking area and subject to the heat and steam from cooking they can rust and break, or just get old and break. Or slam the door and break, you get the idea!!
on Oct 19, 2017
The microwave shuts off after 59 seconds. You can
is a problem in one of the damper-related components, either the switch
or motor or the damper door may be binding.
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
See the attached sample
drawing for a typical damper assembly.
We have the applicable
service manuals for these models and have uploaded them to our site here, here and here to help you.
If a switch is all you
need, we offer a universal type for only $5 postpaid which you can
happy to help you with free advice and we'd appreciate your
thoughtful rating of our answer.
on Jan 27, 2015
Sharp R-1874 works only by pressing the door in
Your connection is bad. Start with a good and complete cleaning of the product. UNPLUG FIRST. Sometimes in the hinges things gum it up. DO NOT STICK anything into the door latch area.
If this continues, you have an issue that must be decided if you should REPLACE or repair. Repair will cost more than replacing. Sorry.
on Mar 06, 2014
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