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Sharp R8310 blows inside fuse when microwave

Sharp R8310 blows inside fuse when microwave swiched on

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  • Anonymous Mar 25, 2014

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If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

Here is a link you or someone you know can use to test it, but please read the safety info:

http://www.gallawa.com/microtech/cap_test.html

Info on ordering Sharp UK parts / spares is here.

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

Posted on May 12, 2009

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Posted on Jan 02, 2017

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2 Answers

What causes microwave to blow new fuse?


The only thing inside a microwave oven that draws enough current to blow a fuse is the magnetron that generates the microwaves to provide the cooking power. Based on the age of the unit (approx 15 years) it is most likely best to just replace it as repairs at that level are not cost effective. Newer units cook better and faster using less power these days.

Jul 02, 2015 | Sharp Microwave Ovens

1 Answer

Why does my Sharp Carousel convection microwave keep blowing fuses ?


I am wondering which fuse is blowing?
There are at least two fuses fitted internally and in the UK at least another fitted in the plug of the supply lead.

It isn't wise for an unqualified person to replace the internal fuses of a microwave even if it is switched off as there is a capacitor inside that is capable of storing a dangerous amount of energy.

The reasons why a fuse blows is either because there is a poor connection close by that is generating a lot of heat or the the fuse rating is incorrect or of the wrong type (quick-blow instead of slow-blow) or the appliance is consuming more current than it should be.

Microwave ovens have a fairly simple working principle and there aren't many things to go wrong. When things do start to go wrong or components become tired it is usually translated into a loss of efficiency that can be measured by how long it takes to boil a measured quantity of water, for instance.
Periodically timing a measured quantity of water to boiling point is a good way to monitor the performance of a microwave and when efficiency falls significantly take it to the service shop before something destroys itself and causes more damage.

In my limited experience the magnetron could be failing but the internals of a microwave should remain a mystery to the unqualified.
I hope this helps a little.

Jan 15, 2015 | Sharp Microwave Ovens

2 Answers

The internal 8a ceramic fuse has blown on my Sharp platinum collection 900w microwave oven, model R-957. fuse is marked F8AH 240V and is located on a small circuit board inside the rear of the oven. is...


Don't know if this a regular problem with this unit, but for this fuse to blow, there must be a problem further downstream. Maybe with the power supply or the Magnatron.

Sep 07, 2010 | Sharp R-1874 Convection/Microwave Oven

1 Answer

Sharp R8310


If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

Here is a link you or someone you know can use to test it, but please read the safety info:

http://www.gallawa.com/microtech/cap_test.html

Info on ordering Sharp UK parts / spares is here.

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

May 11, 2009 | Sharp R-1210 Microwave Oven

1 Answer

Sharp R-930AK convection/microwave suddenly died


You need to open the oven (unplugged) by removing the screws along the case. Inside, there is a 20 amp fast blow fuse that you can get at Radio Shack. It looks cylindrical and white. I would test that first. However, replacing the fuse may work, but then, other components may have shorted inside causing the fuse to blow. Try the fuse replacement/test it first. Good luck

Apr 10, 2009 | Sharp R-930AK Convection/Microwave Oven

1 Answer

Sharp convection/microwave R8310 owners manuel


I have the manual for the R-8310 convection microwave oven by Sharp. Contact me @ mimi@CookbooksPlus.com.

Feb 23, 2009 | Sharp Microwave Ovens

1 Answer

Please help me


Q - My microwave went dead when I opened the door ( same problem as closed the door ).
A - This often is a stuck or faulty door switch and it has blown the interior microwave fuse.
Q - My microwave is completely dead.
A - House fuse has blown or interior fuse inside the microwave has blown ( usually a part inside the microwave makes this fuse blow ) Sometimes a bad fuse holder inside the microwave cannot hold the fuse tight enough and the fuse will blow as well. 
Q - My microwave blows the fuse inside itself as soon as I push the start button.
A - Usually a shorted high voltage capacitor...see components section.
Q - I burnt something in my microwave and now it is dead...help!
A - The fuse inside the microwave may have blown, but more commonly the flame/oven thermostat has sensed the over cooked food and the flame/oven/cavity thermostat has opened up - Info on that 
Q - My microwave seems to shut off every once in a while, what might be wrong?
A - Make sure you hear the fan is still operating in your microwave. Next is to make sure the air intake grill on your microwave is not plugged up with air borne dust and dirt.
Q - The microwave makes a loud "hum or buzz" noise but will not heat up the food?
A - 9 times out of 10 this is usually this is a bad magnetron, the other time is sometimes a bad high voltage diode. See components section.





Jan 02, 2009 | Sharp R-242 Microwave Oven

1 Answer

Makes a loud humming sound and blows fuse behind controll panel


Most likely a shorted capacitor is causing the fuse to blow. Easy and cheap to fix.
Check with www.martinmicrowave.com or call toll free 1-877-894-0035 for parts info

Sep 02, 2008 | Sharp R-1460 Microwave Oven

1 Answer

Sharp R-9H66C Microwave Convection blowing fuses


check high voltage transformer and high voltage diodes, condencer, and magnetron.,

Oct 27, 2007 | Sharp R-963 Convection/Microwave Oven

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