Quote:
Originally Posted by Monkey Wrench
Just thinking that the thermal switch an probably be checked for resistance at different temperatures
If it just goes open or closed it could be jumped or disconnected to test that and see if fan runs.
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From the clarks link I posted above:
Testing the Early Thermofan Switch
Tools
· Thermometer (which goes to at least 200 °F)
· Multimeter
Procedure
1. Connect a Multimeter across the contacts on the thermofan switch. The thermofan switch contacts should be open (i.e. infinite resistance on Multimeter).
2. Suspend the thermofan switch in a pan of water and heat the water on a stove. Insert the thermometer into the water to monitor water temperature.
3. When the water temperature reaches 198° F, the contact in the thermofan switch should close (i.e. zero resistance reading on the Multimeter).