Testing a thermostat
|Disconnect the power source to your dryer before you conduct this or any other test. Either unplug the unit from the wall outlet, remove the appropriate fuse from the fuse box, or flip the appropriate breaker in the circuit breaker panel.|
Your dryer uses multiple thermostats to regulate its internal temperature. The cycle selected determines which thermostat is used. A cycling thermostat can be found somewhere in the path of air that is leaving the drum. It could be found on the blower wheel housing or inside the venting/exhaust system. Dryer thermostats are usually oval shaped and about an inch and a half in length. Also, there should be two wires leading to each thermostat. Label these wires before you remove them so that you are able to correctly reconnect them later.
The wires leading to the thermostat are connected using metal slip on connectors. Remove the wires by pulling on the connectors, and not the wires themselves. It may be a good idea to use a pair of needle nosed pliers to help you.
Set your multimeter to the R X 1 setting. Take each of your meter's probes and touch one to each terminal. You are testing for continuity, and you should receive a reading of either zero or infinity. At room temperature, testing the thermostat should produce a reading of zero. But if a thermostat is tested when it is heated to its limit, a reading of infinity should be produced. We strongly recommend that you test your thermostat at room temperature.
If the test you conduct with your thermostat does not produce these results, then you should replace the component.