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Dryer is not drying and I think blowing cold air.

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Solution depends on the dryer model.
On many dryer of both kinds (electric and gas) there is a thermal fuse mounted to the exhaust duct . Test the fuse using multimeter to read continuity. If it has blown replace it.

On electric dryer.
Test heating element. Element is tested cutting wiring to element contact, and reading Ohms with multimeter set to Rx1. If it has infinite ohm, then element is faulty.
After heating element test the high limit thermostat. thermostat must read low impedance at room temperature, and will have no continuity at limit temperature.
If both parts are OK, the technician will read voltages on wiring harness from electronic control. For safety reasons it is better if the user does only tests with power not connected.
If this is a gas dryer instead:
Check if the ignitor has spark, if it does , then the ignitor must be replaced, after testing if there is power getting to ignitor. Valve is usually regulated by a coil mounted on top of valve assembly, test it or replace the valve assembly.

Posted on Sep 28, 2009


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