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Problem for Sharp R-1850A 850 Watts Convection / Microwave Oven

Shuts down after 59 sec

By Worm on Dec 20, 2006

" "

Microwave will shut down after 59 sec, time remains. Must press start again and will run 59 sec more. Doesn't require cool down. Every other aspect is working fine. Ordered new control unit and replaced but same problem still there.

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Same Problem

Jan 11, 2009

- Sharp R-1874 With same problem, shuts down after 59 seconds. Ordered damper motor. When it arrives I'll open the case and see if its readily accessible. From the exploded view, it appears to be on the right side of the unit, behind the control panel. Also note that there is a high energy capacitor in the microwave that can store a substantial charge so unplug for at least an hour before disassembling and still be careful what you touch. - MrRat

Nov 03, 2007

- Our R-1870 had the same problem. Replacing the $10 damper motor fixed it. The tech said it COULD have been the control circuitry, the damper itself, or the microswitch that the damper hits, but it was in fact the motor.- Guest

Best Solution

posted on Dec 21, 2006

Rotu

Rank: Guru
Rating: 90%, 609 votes

Sounds like someone else got it already, I just got the phone with sharp tech support for the exact same problem, and they said to replace the damper motor and switch if the board didn't do it. Good Luck!

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Solution #2

posted on Mar 04, 2007

Guest

Rank: Apprentice
Rating: 0%, 0 votes

It was the damper motor. $10 part fixed it. Thanks

Solution #3

posted on Dec 20, 2006

MicrowaveSvc

Rank: Guru Sharp

Expert
Rating: 89%, 5355 votes

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.

Comments:

Nov 05, 2007

- I just wanted to update this reply since it's so popular:

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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Solution #4

posted on Oct 20, 2008

pak48188

Rank: Apprentice
Rating: 0%, 0 votes

Replaced damper motor twice! First replacement motor did not turn. Second one was OK, these motors are cheap JUNK. Last Sharp I buy!

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Solution #5

posted on Apr 06, 2008

ArchH

Rank: Apprentice
Rating: 100%, 1 votes

Exact same problem. Very common problem with the people we know that have motorhomes with Sharpe R-1874

Mine was the damper motor. $14.95 for the motor.

The total bill for removing and reinstalling in my motorhome with parts was $106.45.

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