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Re: The dryer runs but does not heat. Thoroughly cleaned.
The duct fuse must have continuity in order for power to get to the gas assembly even though she may run she won't heat if the fuse is blown. If that is good and you have power to the gas assembly nothing will happen if the flame sensor is dead. If the sensor is good then the next thing to check is the ignitor. MORE
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Check the following:
1. Does it have 220 volts (yes it runs, but dryers run on 110 volts)?
2. Check the heating element and the safety thermostats located on the heat element canister. Low air flow from any restriction like lint build up or mashed ducting or blocked air exhaust vent cap can either trip the safety stats or burn out the element. Clean dryer and exhaust ducting thoroughly and replace bad parts before placing back in service. Poor air flow is the number one problem with "No Heat" dryer issues.
A defective heating element can make a dryer too hot. If the element partially shorts out, it can produce heat all the time, regardless of whether the dryer is calling for heat. Remove the heating element to inspect it. The coils should not be touching each other or anything else.
Other Causes and Conditions
Air Flow Problem
Dryers need good ventilation to work properly. If the vent is clogged it can make the dryer too hot. Clean all of the vent tubing thoroughly.
Although not common, a defective cycling thermostat can make the dryer too hot. The cycling thermostat is supposed to turn on and off the heat to maintain the proper temperature. If the thermostat is defective it may keep the heat on too long. The thermostat is not adjustable or repairable, it must be replaced.
Most dryers have a felt seal at the front and rear of the drum to keep the heat inside the drum. If the felt seal is worn away or missing, the dryer may keep heating and make the dryer too hot. This is not common.
A defective blower wheel will not spin properly and will not vent the hot air, making the dryer too hot. Check to see if there is adequate airflow out of the dryer.
First clean out the exhaust vent tubing entirely and then try it. It may heat up very hot if thoroughly cleaned out. A moister sensor detects any lint build up and put the burner into a check mode that prevents home fires in the exhaust vents
Do this first Remove all exhaust vent tubing and clean it out thoroughly. Any lint build up will prevent the burner to operate A moister sensor stops the burner when it senses lint build up Reattach the vents now and proceed to the next steps below If thoroughly cleaned & no build up is present start the dryer and listen for the spark ignitor to click. If it does not click the ignitor is bad. If it does click and no heat appears to come through the dryers drum within 30 seconds the moister sensor is at fault