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Dryer start up fine then the gas turns off as ignitor continues

Looking at some of the other posts, I have taken the front bottom cover off to obswerve the process. Initially, the Amana ALG443RAW starts the heating process, the gas lights. After a few minutes, the gas turns off. The ignitor light continues to cycle but the gas is not lighting and therefore no more heat? What can I check that would continue the heat cycle? I have the dryer set to timed drying. In another post, someone said that would keep the heat going for a timer based period.

Thanks,

Jim

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Hi Jim. Perhaps this will help you.

The burner assembly consists of the gas valve, the igniter and sensor, and the thermostats. The gas supplied to the appliance is turned on and off by the gas valve, as follows:


  • First--when you close the dryer door, set the timer, and press or turn the Start button--the motor starts. When it reaches full speed (in about a second) a switch on the motor turns on, which allows the electricity to flow through a simple thermostat to one side of the gas valve.

  • The gas valve then sends power to the igniter, which glows bright orange.

  • As heat and light from the igniter warm up a sensor that's right next to the igniter, the sensor circuit opens, then supplies power to the other side of the gas valve. This completes the circuit and opens the valve.

  • Once the valve opens, the gas rushes out and the igniter ignites it. As the gas burns, it keeps the sensor warm, which keeps the gas flowing.

  • When the dryer reaches the pre-set drying temperature, a simple thermostat turns off the flow of electricity to the gas valve and therefore turns off the gas.

  • When the temperature in the dryer falls about 20 to 30 degrees, the thermostat again allows the electricity to flow through to the gas valve, and the cycle starts over.

If you selected the Automatic setting, the cycle continues until the clothes are dry, then the timer advances and turns the dryer off.

If you selected a timed setting, the cycle continues until the time has expired, then the timer turns off the dryer

Posted on Jul 27, 2009

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  • Master
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It sounds like the problem could be faulty gas valve coils. When the coils are energized they open the gas valves. If defective, the ignitor will operate, but the valves don't open and the gas cannot ignite. Because it is difficult to test the coils, it is usually wise to replace both or all of them at the same time. Hope this helped and best wishes.

Posted on Jul 27, 2009

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