If this set of dryer parts fails you will need to check your dryer and home ducting for clogging. The thermal cut-off needs to be replaced as a set. The thermal cut-off is a set of two thermostats, one of which will not reset once cool. It will break electrical contact to the dryer's burner or heating element if it senses that the dryer is reaching an unsafe temperature. The dryer's thermal cut-off is similar to the thermal fuse and the high limit thermostat. Test: Disconnect all connecting wires and check for continuity across the hi-limit thermostat or sensor set. The hi-limit thermostat is a fairly reliable dryer component and is rarely the cause of dryer heating problems. Symptoms are usually a very short heating cycle with a low drum temperature, or no heat at all. The hi-limit thermostat will cycle the dryer's burner or heater off if the ducting has become clogged blocking proper airflow. The hi-limit thermostat is a safety switch that will break electrical contact to the dryer's Heating Element if it senses that the dryer has become too hot. There should be no resistance measured (a closed circuit, allowing electricity to flow). The thermal fuse along with a broken door switch is the most common cause of electric dryers that will not start.ĭisconnect all connecting wires and check for continuity across the two wire contacts. This fuse will often burn out due to clogged dryer ducting or a defective cycling thermostat. The dryer's thermal fuse is a non-resettable safety fuse that is designed to break electrical contact to the dryer's heater if the dryer becomes too hot. Thermal Fuse | Hi-Limit Thermostat | Thermal Cut-Off | Cycling Thermostat | Thermostat Heater | Start Switch | Timer Motor | Temperature Switch | Heating Element | Blower | Belt | Belt Switch | Door Switch | Drum Bearing | Belt Pulley | Drum Support | Thermistor | Air Flow (Note: Label all terminals and connecting wires before disconnecting them for proper reinstallation.)Ĭlick Here For Gas Dryer Parts & Troubleshooting Help All tests should be preformed with the dryer unplugged and all wires connected to the part being tested unplugged. This page provides a description as well as simple testing methods for each of the parts and components related to an electric dryer.
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