Rockycmt
Member
I am sloowly rebuilding my furnace. 30+ years old. It has light use so not wanting to do a replacement. I have two swithces in the heat exchanged of the box. (Not the fire box) One is gray 471955437 and one is red. Cant fully read the numbers. Can anyone tell me what they do? I assume
one is a limit switch that will close when the temp goes up. To turn on the HVAC fan. And opens as it cools to turn the fan off. And the red is a high limit to shut down the whole system if too hot.
Thoughts?
one is a limit switch that will close when the temp goes up. To turn on the HVAC fan. And opens as it cools to turn the fan off. And the red is a high limit to shut down the whole system if too hot.
Thoughts?