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Dryer does heat for 5 to 7 seconds then goes out. I used meter to check hi limit sensor and

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  #1 (permalink)  
Old 04-19-2013, 11:55 AM
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Default Maytag Dryer Thermostat Issue
Model Number: LDG412   Brand: Maytag   Age: 5 - 10 years   

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Dryer does heat for 5 to 7 seconds then goes out. I used meter to check hi limit sensor and got some numbers,but at room temp. Do I need to check this when warm? also checked both cycling thermal-stats and got no reading after unplugging all 3 wires. Also at room temp. Do the Hi-Limit sensor go bad faster than the cycling sensors? Any help will be appreciated.


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  #2 (permalink)  
Old 04-19-2013, 01:13 PM
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Quote:
Originally Posted by buddha131 View Post
Dryer does heat for 5 to 7 seconds then goes out. I used meter to check hi limit sensor and got some numbers,but at room temp. Do I need to check this when warm? also checked both cycling thermal-stats and got no reading after unplugging all 3 wires. Also at room temp. Do the Hi-Limit sensor go bad faster than the cycling sensors? Any help will be appreciated.
Buddha, All the thermostats and thermal fuses, should produce a "closed" circuit when tested at room temperature with a multi meter set at the RX1 scale on the meter. Cycling thermostats are usually rated at approximately 155 degrees and Hi Limit thermostats at approximately 200 degrees(the temp.range can be found on the thermostat or the label).

If the hi limit switch is "forced to operate as the cycling thermostat, due to an air flow issue, it can and usually does weaken or fail before the cycling thermostat, after all it is a "safety" device, and not really designed for "continuous service" like a cycling thermostat. You may want to disconnect the exhaust vent from the back of the dryer and check and clean the vent system all the way out to the vent hood. A measuring cup with water heated to the temperature rating of the thermostat is a good way to test the thermostat. If all checks OK, suspect a weak set coils on the gas valve.
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Old 06-30-2013, 07:40 AM
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Did Install new coils,Still has intermittent lighting problem, On for 10 seconds then off, when it re-lights on for 2-3 sec. then off. About every 45 seconds. Driving me nuts? Thank you need your help.
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Old 07-01-2013, 07:30 AM
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Quote:
Originally Posted by buddha131 View Post
Did Install new coils,Still has intermittent lighting problem, On for 10 seconds then off, when it re-lights on for 2-3 sec. then off. About every 45 seconds. Driving me nuts? Thank you need your help.
Buddha, If you've checked and cleaned the vent system and vent hood. The thermostats check proper at room temperature. Remove the front bulkhead and check and clean any lint accumulated in the outlet duct, below the lint filter. Check and make sure there are no clogs or lint built up inside the blower housing, and replace the hi limit thermostat.

Part number: AP4036956

Part number: <b>AP4036956</b>
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