Question about Sharp R-1870 Convection/Microwave Oven

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No matter what time i put in it cuts off in 60 seconds on a sharp

Model 1870

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  • HotCap Jan 27, 2015

    I bought a Sharp Microwave Oven with Sensor, Grill and Convention functions, R-967(SL)M, a few years ago in London, United Kingdom. Problem: Now, each time the timer counts down to 1 second (for example, 1 sec. or 2 mins. 1 sec. or XX mins 1 sec.), the heating function just stop as long as the timer shows 1 second. In addition, I relocated to Hong Kong and the local Sharp customer service refused to provide any repair service (even if paying!) since I did not buy the product model in Hong Kong! The warranty period has ended, hence there is not an issue with warranty service. Appreciate if any expert(s) out there could kindly provide assistance or at least offer a direction/suggestion which I could pursue to get the appliance back to working again. Thank you!

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  • 178 Answers

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.

Posted on Sep 14, 2009

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Posted on Jan 02, 2017

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My Sharp Micro Convection Model R1870 fan behind the touch panel keeps running for 50 seconds after the microwave turns off,. this is not the vent fan. it also runs for 50 seconds when you turn the...


If the fan seems to run even after the microwave had completed the cycle, then it is possible that the drive to the fan is having a time delay. Also it has to be made sure that the magnetron has been cut OFF power or else it is not a good situation. You will have to remove the control panel and check on the board, check the drive to the fan, since the processor cuts off the fan and magnetron at the same time the fan circuit must be traced. Look to the circuit after identifying the fan wiring and back check using a multimter if you are able to trace. If not take help as this can be harmful in case the microwave works till the fan cuts off. A faulty capacitor on the board can create this time delay.

Oct 11, 2011 | Sharp R-1870 Convection/Microwave Oven

1 Answer

The microwave stops after 50-60 seconds regardless of the amount of time left on the panel


The PCOR30 microwaves are essentially a rebranded Sharp R-1870-series ovens.

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.

The service manuals that cover these models are here:

http://www.microwavedisplay.com/r1874_sm.pdf
http://www.microwavedisplay.com/r1870_r1871_sm.pdf
http://www.microwavedisplay.com/r1850_r1851_sm.pdf

The above manuals will not have Sharp part numbers, not the Dacor part numbers, but they should work, and you can order them from
the Sears Parts Directimage-4235112-10659157 site.

But if you're leery or unsure, you can look up the Dacor part numbers in the part list here, then order by part number from the Pros here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

microwavesvc_11.jpg

Jan 01, 2011 | Dacor PCOR30 Convection/Microwave Oven

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

Sharp convection microwave R-1870 runs about one minute and shuts off. damper Motor switch?


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.

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

2 Answers

It cuts off after 53 seconds on sharp model r-1870


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.

Most computers will open this document automatically, but you may need the free Adobe Reader
http://www.adobe.com/products/acrobat/readstep2.html

If a switch is all you need, we offer a universal type for only $5 postpaid which you can order here.
http://www.microwavedisplay.com/switch_form.htm

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

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

3 Answers

Sharp Carousel II Convection Microvave R-3850


My sharp microwave convection oven (R-1870) runs for 59 seconds and stops. If I push start it runs for another 59 seconds and stops. How can this be fixedd?

Aug 29, 2009 | Sharp R-1870 Convection/Microwave Oven

1 Answer

Timer shuts off


there was a similar problem posted on your site that solved my problem.

Aug 18, 2009 | Sharp R-1870 Convection/Microwave Oven

1 Answer

Sharp model R-1870 Carosel quits cooking at 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.

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.

Jan 26, 2009 | Sharp R-1480 Microwave Oven

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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