Sharp R-1870 Convection/Microwave Oven Logo

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Gary Whaler
Gary Whaler Posted on Apr 03, 2007
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Please help with the problem

I have the above product in my '05 motorhome & it is an over the counter convection microwave oven. It shuts off after 59 seconds & I have to hit the start again for remaining time or another 59 seconds. I've had the motorhome since new & the only problem with the oven. Thank you, Gary R Whaler

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2 Answers

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Anonymous

Worked with the new damper motor but damper stays open , how do you know it is in the right position when you install it?

William Miller

William Miller

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  • Sharp Master 9,179 Answers
  • Posted on Apr 05, 2007
William Miller
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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 located on the right side of the innards. The damper closes and opens depending on cooking mode. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can find an exploded view by entering your model number here: http://www3.sears.com You can order parts from Tritronincs at http://www.wehaveparts.com

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Related Questions:

0helpful
1answer

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.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

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Mar 24, 2016 • Sharp R-1870 Convection/Microwave Oven
0helpful
1answer

The microwave shuts off after 59 seconds. You can push the START button and it will start again but shut off after 59 seconds. The convection oven component does the same thing.
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 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 order here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Read full answer
Dec 16, 2010 • Sharp R-1874 Convection/Microwave Oven
11helpful
1answer

Stops every 59 sec.
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. That's the giveaway.

See the attached sample drawing for a typical damper assembly.

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

Hopefully these cover your model number, which you didn't mention.

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
[email protected]
http://www.microwavedisplay.com

d34621a.jpg
Read full answer
Jul 07, 2010 • Sharp R-1870 Convection/Microwave Oven
1helpful
1answer

Microwave/convection oven in our fifth wheel will not run past 59 seconds. For example trying to reheat a cup of coffee set at two minutes - it will only run for 59 seconds. I am afraid to try the...
looks like the timer brain has packed up on you,,
how old is it,, it may be cheeper to just replace the microwave as there not very pricy now,,there is very little inside them that you could fix your self, however,, putting your hand inside the back could kill you? so dont try it, play safe buy a new microwave insted
Read full answer
Oct 26, 2009 • Sharp R-1870 Convection/Microwave Oven
1helpful
1answer

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.
Read full answer
Sep 12, 2009 • Sharp R-1850A Convection/Microwave Oven
5helpful
1answer

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
[email protected]
http://www.microwavedisplay.com

b27054b.jpg
Read full answer
Aug 30, 2009 • Sharp R-1871 Convection Microwave Oven
0helpful
1answer

Every 59 seconds the unit stops
does anyone know what this problem is
Read full answer
Mar 12, 2009 • Sharp R-1874 Convection/Microwave Oven
1helpful
4answers

Unit runs for 59 seconds and shuts off
This is a problem in one of the damper-related components, most likely the switch or motor, but it may also be the motor or the damper door.

The damper is a door located on the right side of the innards. The damper closes and opens depending on cooking mode.

If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk

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

You can find a helpful exploded view by entering your model number here: http://www3.sears.com
Read full answer
Nov 16, 2007 • Sharp R-1870 Convection/Microwave Oven
0helpful
1answer

Shuts off after 59 seconds
That would be a problem in the damper aseembly, 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.

If you or a friend decide to look into it, we have critical safety information, switches diagnosis and replacement, and disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

a6579a0.jpg
Read full answer
Oct 24, 2007 • Sharp R-1874 Convection/Microwave Oven
0helpful
5answers

Shuts down after 59 sec
Chances are you have a bad damper switch or wiring. A sample photo is here: http://207.234.249.73/mwd/damper.jpg It might also be a problem with the humidity sensor or a problem with the control panel, such as corrupted code or bad connections.
Read full answer
Dec 20, 2006 • Sharp R-1850A Convection/Microwave Oven
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