[trksmiley]

We used to get a short circuit sound from the microwave and now no sound but also doesn't thaw or heat anything very well. It works but will take 3-4 times longer than it should.

Any help would be greatly appreciated.

[Joe / APP Team]

Originally Posted by trksmiley

We used to get a short circuit sound from the microwave and now no sound but also doesn't thaw or heat anything very well. It works but will take 3-4 times longer than it should.

Any help would be greatly appreciated.

TRK,

Try this power output test first, we'll have a better idea where to go from there.

At this point, I'm guessing you probably have a bad control board, But I'd prefer to be more positive.

The power output of the magnetron can be measured
by the following tap water temperature rise test:

✔

Be sure oven cavity is clean and cool (not used
recently).

✔

Low voltage will lower the magnetron output.

1.

Fill a glass beaker with 32 oz. (1000 ml) of tap water.
Stir the water with a thermometer (digital recommended)
and record the temperature. This starting temperature
should be between 50°F (10°C) to 75°F (24°C).

2.

Place the beaker in the center of the oven. Operate
on HIGH power level for 60 seconds.

3.

When done, stir the thermometer through the water
and record the temperature.

4.

Subtract the cold water temperature from the warm
water temperature to get the temperature rise.
Normal range is as shown in the following table:

At 120 (VAC under load)
Temperature Rise

22 to 26 degrees F.

Thanks,