If the clothing in your dryer is still wet and cold after the cycle finishes and it takes additional time to fully dry your laundry, then your dryer might not be heating. A dryer that is no longer heating could be caused by a problem with one of the following parts below.
WARNING! Before attempting to work on any appliance, make sure that all power (electricity) and utilities (water and gas) have been turned off and/or disconnected on the appliance. Read this before you start any repair.
The thermal fuse is a safety device that shuts off the dryer when it detects dangerous levels of heat inside the dryer. This is done to prevent fires and also to prevent damage to the dryer’s motor. If the thermal fuse is blown, it might be the reason why there is no heat in your dryer. This part cannot be repaired and will need to be replaced. Test the thermal fuse for continuity and if no continuity exists, replace the thermal fuse.
If the thermal fuse is the reason for there being no heat in your dryer, then this might be caused by a clogged dryer vent or an overloaded dryer. Check the dryer venting for lint build-up and also the outside venting for any obstructions. Clean the venting and do not overload the dryer in order to prevent this from happening again.
Ignitor – Gas Clothes Dryers
The ignitor heats up and ignites the gas in the burner assembly which creates the heat inside the dryer. If the ignitor is not working, then the gas will never be ignited and no heat will be produced. The ignitor can weaken and wear out over time. Test it for continuity using a multimeter and replace.
Gas Valve Solenoid Coils – Gas Clothes Dryers
Gas Dryers use a set of gas valve solenoid coils to open and closes the gas valve ports to control the flow of gas to the ignitor. The ignitor ignites the gas and creates heat for the dryer inside the burner assembly. The gas vale solenoids need to open and close throughout the dryer’s cycle in order to maintain the proper temperature inside the dryer. Sometimes the solenoids will work for a short period of time at the beginning of the cycle but, stop working during the dryer’s cycle, leaving laundry only partially dry.
The coils can be tested for resistance with a multimeter. Both coils should be replaced if one coil is defective.
Heating Element – Electric Clothes Dryers
The heating element heats the air inside the dryer drum of an electrical dryer. It might look like a metal coil, or several smaller metal coils attached to a metal casing. It can be square or circular in shape, depending on your dryer’s model. If the heating element is defective, it will have no continuity when tested with a multimeter and will need to be replaced.
Other Parts That Can Cause No Heat in a Clothes Dryer
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