Question about Sharp R-1870 Convection/Microwave Oven

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Sharp microwave model #1872

The microwave will still turn on and you can still hear the fan blowing. The turn table no longer turns and will not heat on either the microwave or the convection setting?

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  • carolyn10 Nov 01, 2008

    You hit the nail on the head! I had never tried your website before, so unfortunately I didn't wait for your response before I called a repair man. Boy did I learn my lesson. I spent $120.00 and felt like I got a fairly good deal. (After all I didn't have to buy a new microwave.) I will totally trust this site and come here FIRST each and every time! Thank you for your timely response and for teaching me a valuable lesson!

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Small clear square at top of oven missing

Posted on Dec 02, 2008

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Most likely the lower door interlock switch is bad. Cheap and pretty easy repair.

Martin Microwave Inc. sells the switches for around $5....

www.martinmicrowave.com

Posted on Oct 31, 2008

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1 Answer

How to fix loud hum and no heating in Sharp model R-308KW?


Hi,
There could be a variety of reasons why this happens, but the likeliest
reason is the secondary interlock or monitor switch is broken. These are micro switches that tell the microwave that the door is closed. If this switch is broken, then the microwave thinks the door is still open and the carousel table won't turn, and the oven will not heat up.
I replaced an interlock switch last Saturday. The switch was $7.00 and took me an hour.
Ask your local repair person to test the interlock and monitor switches first, then go from there.
Good luck,
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Okay, first we need to separate the situations. You were boiling water on the stove and had the range hood fan running to **** up the steam. Then you put something in the microwave to heat and you heard a pop and then zip-o.

The water on the stove has nothing to do with the situation, the fan you turn on is not part of the microwave, so it has nothing to do with the microwave.

The pop you heard and then the humming suggests the magnetron failed. You said you found a blow fuse and replaced it and still nothing, right? The magnetron is the most likely culprit...I would think it is safe to say that the magnetron shorted and drew enough current to blow the fuse.

Replace the magnetron and if that doesn't work, let me know here. Good Luck!

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1 Answer

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3 Answers

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but the magnetron that heat the food is bad and will need replacing
I would ask a electronic shop how much they would charge to replace it , and if is not worth it to you then a new one would be a good call

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The turn table and fan are connected in series with the bulb,as you have mentioned that you have replaced bulb,so please check again for any loose contact on bulb holder or bulb continuity again.

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