Gregory B for Model Number Amana ALG 643 RBC Amana Gas Drier Stops getting hot after 6 minutes In all modes, the dryer comes on normally. It starts tumbling, the igniter lights, the gas comes on and ignites after 25 seconds. After about 6 min. the gas goes out …and stays out. The igniter continues to cycle on and off, but the gas never comes back on. I shut it off, wait 20 min., and start the routine again. I have replaced the cycling thermostat and the timer unit (wasn't necessary). --------------------------- Test: I jumpered the flame sensor and attached the flame sensor terminals to a continuity tester. Result: I had full continuity through the flame sensor and then fired up the system. System started normal as above, but after about 25 seconds, the flame sensor switched closed as normal, and the gas never came on. Conclusion: Flame sensor seems to work properly. Flame sensor closes when heated and cuts current to the coil which allows gas to flow. Test: I jumpered the limit thermostat and attached the limit thermostat terminals to a continuity tester. Result: I had full continuity through the limit thermostat and then fired up the system. System ran the same as above, and was not affected by the test. Conclusion: the limit thermometer does not seem to be the issue and probably only breaks the current when the temperature exceeds the safety limit. I am still stumped. Please Help.
Answer Gregory, It sounds like the coils 279834 on the gas valve may be the issue. It allows the gas to fire but once it has time to heat the coils it breaks the circuit in the coils and causes unit to not light anymore. Read More... Answered by AppliancePartsPros.com | Thursday, April 18, 2013