I need to replace my thermofan switch. I'm just glad its not the fan relay. How do I tell which temp switch I have? I read you need to match it to the thermostat... is there a part number printed on the switch somewhere?

Thanks

 

Yes there is. The ID numbers are stamped on the switch. The 75/70 switch is 823.959.481. The next one up is 823.959.481D. It is the 82/77 switch.

 

Thank you!