Question about Sharp Microwave Ovens

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No matter how long you program it for it will shut off after 59 seconds. Everything else works fine. Sharp--Model R-1872, Serial # 112635 Purchase date 2/04.

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Hi

Thanks for using FixYa. This is a common issue with the sharp microwave ovens, it occurs due to 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 the oven which opens or closes depending on cooking mode selected. If the controller senses that the door is not in the right position, it will shut down the cook cycle. It can also be due to a bad lower door interlock switch.


Please check Parts #1-22 (Damper Motor ), #4-1( Damper), #4-27( Damper c) in this diagram--

No matter how long you program it for it will shut - 69feb06.jpg

Please click on the above image to zoom in.

Please do accept the solution if the issue is resolved or else revert for further assistance.

Thanks
Rylee

Posted on Sep 11, 2009

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1 Answer

Sharp microwave r1870 only runs for 59 seconds


If it consistently runs for exactly 59 seconds, and shuts off, it's probably the control panel.

If it runs approximately that length of time, you might have a defective thermal protector on the magnetron, or the magnetron is running too warm for some reason.

Mar 24, 2016 | Sharp R-1870 Convection/Microwave Oven

1 Answer

My sharp will only run for 59 seconds and then shuts off. It will heat up what ever you are heating but shuts off after 59 secounds no matter how many minutes you program into it.Is there a simple solution...


Yes the timer has the problem, now a day it is built in on microcontroller if your microwave is digital control. The only you can do is send it to nearest service center in your area where they have that parts.
I do hope my advice help you.

Mar 27, 2011 | Sharp R-1870 Convection/Microwave Oven

1 Answer

My Sharp R-975 Microwave after settin the timer and starting only runs for 59 seconds and stops, I can press start again and it goes for another 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 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.

microwavesvc_30.jpg

Mar 13, 2011 | Sharp Microwave Ovens

1 Answer

My Sharp micro will stay on for 59 seconds and shut off no matter how long the timmer is set. Sharp model r 1870 It does this every time it is used . The control board has been replaced.


This is not a problem on the board, it 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.

We have the applicable service manuals for these models and have uploaded them to our site here and here.

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.

Dec 17, 2010 | Sharp R-1870 Convection/Microwave Oven

1 Answer

Amana OTR Convection Microwave runs 59 seconds and shuts off


This sounds like either a thermistor or a damper switch/motor problem.
Amana's technical support line is 866-426-2621. This is the commercial side but they should be able to get you in touch with the domestic side.

Sep 12, 2009 | Sharp R-1850A Convection/Microwave Oven

1 Answer

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.

Sep 08, 2009 | Sharp R-1870 Convection/Microwave Oven

1 Answer

Sharp model R-1871 shuts off every 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 models stop after 59 seconds.

See the attached sample drawing 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.

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.

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

b27054b.jpg

Aug 30, 2009 | Sharp R-1871 Convection Microwave Oven

1 Answer

R957 cooks for 59 seconds then stops ,resumes for 59 seconds if cook /start pressed all cooking modes affected kitchen timer works ok


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.

4ae6a48.jpg

Jul 31, 2008 | Microwave Ovens

1 Answer

59 Second shut off


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 (on the right side in your model) that opens or closes depending on cooking mode. If the controller thinks that the door is not in the right position, it will shut down the cook cycle in 59 seconds.

See the attached sample photo.

If you or someone you know wants to look into this, we have *critical* safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

We have a partial service manual at our site here.

You can usually find a Sharp exploded view by entering your FULL model number here: http://www.searspartsdirect.com

You can order Sharp parts there or from Tritronics at http://www.wehaveparts.com.

We're happy to help and we appreciate your thoughtful rating of our answer.

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May 26, 2008 | Sharp R-1870 Convection/Microwave Oven

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