I have a Kenmore gas dryer that starts up fine and heats for about 5 minutes; then the burner shuts off, leaving the drum turning but slowly cooling down.
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Thank you for your question and I understand your concern.It's not abnormal for the burner to shut off once the dryer reaches operating temperature but the burner should re-ignite once the temperature drops and the operating thermostat closes again. If the burner is shutting off before the dryer reaches operating temperature; this could be cause by a restriction inside the vent system. For testing purposes only; disconnect the vent hose from the back of the dryer and then see how long the burner stays on. If the burner remains until it reaches operating temperature, check the vent system for restrictions. Also check the lint screen. Even though the lint screen may appear perfectly clean, it could have a clear layer of fabric softener residue on it restricting air flow. Wash the filter under warm running water and a soft bristle brush.Now; if you find the glow bar igniter glowing red and then fading off without burner ignition, the two solenoid coils mounted on the gas valve are weak and both coils should be replaced.Check the things I have covered here and if I may be of further assistance as more details become available, please reply to this post along with the model number of the dryer.
I too have a Kenmore Dryer, series 80 model #110.76832500. Today it started taking a long time to dry our cloths. I checked the vent lines and they are clear and the air is blowing out fine. The air coming out is a little warm, but not much. I removed the cap at the bottom and looked inside at the igniter. When the dryer starts, I see it glow and then the flame come on. After about a minute it shuts off. After a few more minutes it comes back on for about a minute then shuts off again. I do not know how long this continues, as I did not wait the entire cycle watching. However, I noticed on one of the cycles to complete, 45 minutes, the dryer was completely cool and the flame was not on and the cloths were cool and damp. Do you know what I need to fix? Thanks.
Brett; The burner is supposed to cycle on and off to maintain an operating temperature. I recommend disconnecting the vent hose from the back of the dryer and start the dryer without any clothes and measure the exhaust temperature with a thermometer. On high heat it should average close to 140-150 degrees. Also, if the dryer is exposed to cold ambient temperature, it will take longer to dry clothes or if the clothes are wetter than normal or ice cold, it will take longer to dry. Monitor the burner operation too, if you ever find the glow bar igniter coming on and then fading off without burner ignition, the two solenoid coils on the gas valve assembly will need to be replaced. The is also a high limit thermostat located on the side of the heater box which can become over sensitive and cause the burner to shut off before it reaches operating temperatures. I hope this is helpful.
Ok, the dryer returned to normal activity for the past week, but now has started again to not dry. I was able to find that the igniter glows, but the flame will not turn on. After restarting the dryer several times, the flame finally turned on. Does this help narrow what could be wrong? Thanks.
Brett: Based on your last reply, I recommend replacing the two solenoid coils mounted on top of the gas valve assembly. The two solenoid coils are too weak to open the gas valve. You will need to remove the lint filter and the two screws which were hidden by the lint filter. The top will need to be hinged opened and then the front panel will need to be taken off to access and replace the two solenoid coils. See images below. Disconnect the power cord from the power source before servicing.
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