I have a Sharp Carousel convection oven that will not reach the pre-heat over stage. It will heat and turns off every 5 minutes. I read on your trouble shooting page that this could be a thermistor. Where can these be purchased in the U.S.A.?

I really doubt that you can even get parts.

What are your sympotms? I repair those boards.

Feel free to contact me directly.

- William E. Miller, AS-EET
[email protected]
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

this is the thermistor is time to replace,if the fan of the oven is working,also couse this problem.

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 ,./';
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Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Also the fact it is a convection oven could mean the oven temperature sensor is not picking up the oven temp. it is not telling the machine it is there by the board seeing its resistance, the unit will shut off as a safety feature. The oven sees temperature by reading the value of a temperature dependent resistor. As the temperature changes so does the value of the component ( oven temp sensor) that way the unit determines the temperature inside the unit. Sometimes those sensors will break since they are in the area with the heat and moisture, they get old and break.

Hello :

This happens because of a bad door switch . The plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door .

Check also the turntable . It could be out of it's right place .

WARNING :

1:Don't slam your microwave door because this may cause the fuse to blow and this is the reason of bad door switch problem .
2: A microwave is capable of giving you a serious electrical shock even when it's unplugged , so I recommend you to call a repair technician for help .

please don't forget to rate .

good luck .

This is the thermistor is time to replace

The question is... Do you want to put money on a 18year MW, or put it towards a new one? I must admit I love the SHARP Combo MW Convection ovens. I own two. One is almost 25years old. The mechanical Timer Type, but they work great and I can maintain them with 30years ef exrerience. I am now retired.
It does sound like the Magnetronhas broken down, however it could be other things in the Secondary (High Voltage Side). The High Voltage Side is made up of the Secondary HV side of the High Voltage Transformer, A High Voltage Diode, a High Voltage Capacitor, and the Magnetron. The High Voltage Side is DANGEROUS, and CAUTION should be taken to protect yourself against EXTREME HIGH VOLTAGE. unplug from power and DISCHARGE High Voltage Capaciton to frame GROUND before touching anything!!!!

at highvoltage section wiring may bae problem, check wiring and connectrors of magnetron and capacitor and transformer.