20 Most Recent Sharp R-1850A Convection/Microwave Oven Questions & Answers

Inline with the power cable inside of the machine.

Sharp R-1850A... | Answered on Sep 05, 2019

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.

Sharp R-1850A... | Answered on Dec 13, 2015

Chances are you have a bad damper switch or wiring. A sample photo is here: It might also be a problem with the humidity sensor or a problem with the control panel, such as corrupted code or bad connections.

Sharp R-1850A... | Answered on Jan 27, 2015


I see its some time ago now that you posted this and perhaps you've fixed your micro already or replaced with a new one. I have the same Sharp r-967 microwave which had the same 59 second problem. I researched a bit online found the sevice manuals and tracked the problem down to be the damper motor. I managed to buy one online and replace it quite easily. There are some diagrams online when searching for this problem but for different sharp models where the damper is near the door fixings. Its not the case on r967, its behind the circuit board and easy to remove with a stubby screwdriver. You can find spares from this place. 5 minute job. The 59 second thing is likely to be the either the door switches or the damper motor. Switches are between £5-10. All mine were fine so didnt have to replace any. A quick voltmeter test can check them.


I paid £26 in delivery. Hope it helps if not too late!


Sharp R-1850A... | Answered on Jan 27, 2015

The damper should closed when in convection mode and open when in the microwave mode, to keep the heated air inside the cavity.

Sharp R-1850A... | Answered on Jan 27, 2015

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.

Sharp R-1850A... | Answered on Jan 27, 2015

replace the damper door motor. should solve your problem.

Sharp R-1850A... | Answered on Jan 27, 2015

Usually this can be done easily by removing the door unit and removing the panel to the door wherein you will be able to get access to the door lock. If there is no damage to the pivot or the post to hold the lock and spring , you can push the spring and reset.

Sharp R-1850A... | Answered on Sep 04, 2014

This unit has a three way exhaust capability on it. There is a plate on the back that you remove to set the blower housing to back, top or frontal exhaust. You take the plate off and then just lift the blower assy. up and then reset it back into position for the direction that you want. It may be missing the vent louver for outside exhaust if it wasn't left with the unit when it was installed.

Sharp R-1850A... | Answered on Sep 19, 2013

turntable motor p/n 46-841666-3, available from searspartsdirect.com, use correct model #!!

Sharp R-1850A... | Answered on Feb 09, 2013

That's almost certainly a bad secondary interlock (bottom door switch) or maybe its mount is misaligned or broken.

Even though a door switch clicks, it may still be bad inside.

Door switch or mount trouble is usually caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

If the switch mount is broken, it's usually more economical and safer to add a dab or two of hot glue to the mount to secure the switch. Let it cool for about 30 minutes before using.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Once you've done that, the switches are accessible.

We have the service / repair manuals for this model and have uploaded them to our site to help you:

If you only need a switch, you can order a universal type here for $5 postpaid.

Otherwise, you can find links to helpful exploded view diagrams and part ordering help here.
I recommend that you bookmark that link to your favorites.We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Sharp R-1850A... | Answered on Oct 23, 2012

If no results, ask them, they are a specialized search engine for microwave oven manuals.

Sharp R-1850A... | Answered on Sep 20, 2012

what kind of motorhome is it if it has a inverter it may be kicking in and out due to low voltage or a bad cell in the batteries

Sharp R-1850A... | Answered on Feb 26, 2012

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