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built1950, Handyman
Category: Appliance
Satisfied Customers: 210
Experience:  Appliance Installer
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I have a Sharpe Microwave oven Modle R1874. Shuts off after

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I have a Sharpe Microwave oven Modle R1874. Shuts off after running for just 59 seconds. Works for 59 seconds then I have to start over for another 59 seconds...What could be the problem and do you know of a recall on this unit. The unit is in my motorhome so it does not get used a lot.
Can you hear the fan running when the unit is on?
And is the air intake grill clean?
Customer: replied 7 years ago.
Yes...I can hear the fan and the intake grill is clean.
Then it is likely that a part of the circuit board has failed. I have been unable to locate your unit in the data base with R1874. Are you sure this is the correct full #?
Customer: replied 7 years ago.
Not absolutly sure. Purchased in 2004. Convection microwave. It will take me some time to get to my motorhome and double check
Customer: replied 7 years ago.
I will go and verify the modle and work with you "Built1950" but it will be a long while. I will get back to you in the am.......Sorry for not being ready..
No Problem.
Customer: replied 7 years ago.
Sorry for taking so long "Built1950". I have a Sharp Sensor, Convection Carousel Microwave Model R1870. I checked again. No matter how long I set the timer it will run for no more than 59 seconds and shut off. I just hit the start button and it will start and run again for no more than 59 seconds. What do you think?
Hi again,
Now we're cookin. The R1870 Circuit Board/Timmer is available here:

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built1950 and 2 other Appliance Specialists are ready to help you
Customer: replied 7 years ago.
Thanks Built1950........You were a big help.......I'll tell my wife that at $229.10 to repair 59 second sound real good. LOL.....I accept