Question about Sharp R-1870 Convection/Microwave Oven

2 Answers

Sharp model 1870

Have the same problem as a number of folks regarding the microwave timer unable to program beyond 59 seconds. what is the solution?

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  • 3 more comments 
  • Zeemann Aug 27, 2008

    Timing on all functions of microwave stops at 59 seconds

  • bradwieb Nov 08, 2008

    My R1871 microwave shuts off in 59 second increments.  This must be the problem, but don't know how to fix technically.  What part do I order, and is it easy to fix myself?

  • byersmfg Feb 05, 2009

    runs for 59 sec stops with 1 sec left

  • cyndibaz Mar 12, 2009

    The timer on my Sharp R-1870 shuts off at 59 seconds. This is the third Sharp Convection/Microwave I have owned over the past 20 years. They have all "died" with this problem.

  • ghost48 Apr 22, 2009

    Oven shuts off after 59 sec in all modes how do I fix it.

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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 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.

The best place to order Sharp parts is Tritronics.

If you only need a switch, you can order one from us for $5 postpaid.

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

sharp model 1870 - bb30772.jpg

Posted on Aug 10, 2008

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Great Site For Info: Mine Was The Damper motor For 8.00 + shipping.
Had Estimate over the phone around 200.00 To fix.With this site I ordered the parts and fixed my self. Thanks for great info and Support.
Howard

Posted on Feb 06, 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

Sharp micro counts down 59 seconds and stops


It seems this has been happening over the last few years. I am a retired appliance tech. My 1870 also started the 59 second routine, Also in a motor home. Pure logic. Had to be the board. New board same results. So now I need to run down a parts manual and possibly service manual, and get the damper switch and motor refered to in earlier posts. Changing out the board was fairly simple. Dropping the unit to change out the other components sounds like it will be a tad bit more difficult.

Oct 14, 2012 | 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

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

Oct 26, 2009 | Sharp R-1870 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

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

2 Answers

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.

Jan 26, 2009 | Sharp R-1480 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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