Question about Sharp R-403HW Microwave Oven

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Microwave will not start

I have a sharp r403hwf microwave. When i hit the start button it will not start. But for a while when I held the door button in a little bit it would work. Now it just won't start at all.

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  • Sharp Master
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Your safety door relay is way out of adjustment

Posted on Oct 03, 2009

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Posted on Jan 02, 2017

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My sharp carousel r-510 hwf microwave oven is not working. When it started, I lifted the door and it worked while I held it up a little. Now that won't work. Could it just be it needs an adjustment to...


Door catches.

One of the latches may be damaged or misaligned and is not lifting the other latch clear of the housing. Remove from any power source, remove the cover of the cabinet. Slacken off the clamp mechanism and ease the clamp over the guide to allow the door to open. When the door levers are in place, the door may be easily adjusted by slackening off the screws that clamp the door catch/actuators in place whilst holding the door closed and then tightening the screws. The rear of the door may be adjusted by slackening the lower door hinge screws and adjusting as required.
I hope that helps.



Door switches

If one of the door interlock switches is not switching properly or there is a condensation problem on the sensor control panel, either can cause the turntable/light/oven to come on even though the "Start" button has not been depressed due to the wiring of the switches.
Check for faulty door switches and/or contaminated actuators.
I hope that helps.

Mar 24, 2011 | Sharp R-510HW Microwave Oven

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Sharp 2010 turns itself on, fan runs but does not microwave


The repair or replace decision depends to some extent upon age and repair history.

Oct 04, 2017 | Sharp R-1210 Microwave Oven

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Sharp R-530ES microwave oven stopped working


You have a bad secondary interlock (lower door switch) or its mount is damaged or out of alignment.

We have the service manual for this model and have uploaded it to our site here to help you.

You will need the
free Acrobat Reader to view or print it in case you don't have it.

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

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.


Dec 28, 2008 | Sharp R-530ES Microwave Oven

1 Answer

Sharp microwave


One of your door switches are bad.

Mar 18, 2008 | Sharp R-1480 Microwave Oven

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Push button foe a R-1870F Microwave. Somehow the button slid down in behind the conrols. How do you get it out. It look like some type of spring holds it in place.


You have a broken tab on your door open button (drawing ref. 3-2-4) or a broken door lever (ref # 4-25).

The button is normally held out by the spring.

You can find the entire service manual for the R1870/R1871 at our site here.

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

We're happy to help and we appreciate your thoughtful rating of our answer.

Mar 10, 2008 | Microwave Ovens

1 Answer

START BUTTON


This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

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

This can be caused by slamming the door or by habitually opening the door while it's cooking without hitting the Stop pad first.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

If you think the problem is on the control panel, which we repair these nationwide for $39.95 postpaid.

We're happy to help and we appreciate your thoughtful rating of our answer.

Jan 08, 2008 | Sharp R-320H Microwave Oven

1 Answer

Fans continues to run.


door switches or control circuit, may be loose contact or open check all wiring and circuit...

Dec 18, 2007 | Sharp R-1470 Microwave Oven

1 Answer

Microwave problems. (its "sharp" brand but im not sure of the model #)


This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

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

This can be caused by slamming the door or by habitually opening the door while it's cooking without hitting the Stop pad first.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can find an exploded view by entering your FULL model number here: http://www3.sears.com (the 3 is correct)

We're happy to help and we appreciate your thoughtful rating of our answer.

Dec 15, 2007 | Sharp R-216FS Microwave Oven

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Display shows nothing, microwave cuts off


You need a couple of cheap microswithes that the door latches hit when you close the door and a new control for your display problem which sharp has had a problem with

Oct 30, 2007 | Sharp R-1405 / R-140 Microwave Oven

2 Answers

Microwave auto-starts when door is closed


You probably have a failing door switch or the mount which holds your door switch is loose or broken. In most designs, it is the upper door switch that will produce these very symptoms when it is intermittent or its mount is broken or loose. Opening the door while cooking (without first hitting the STOP pad) is the primary cause of door switch failure. Slamming the door, damage during shipping or transportation and sloppy manufacturing techniques or materials are the primary causes of trouble with the door switch mounts. I have a text file called "doorsw.txt" which helps in diagnosing and repairing door switch problems, and a file called "safety.txt" which is of vital importance. If you or a friend decide to work on it, we have *critical* safety and disassembly info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk

Mar 03, 2007 | Sharp R-1200 Microwave Oven

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