Does the temperature have to be the same on the new switch?


The correct answer is yes. Do guys use a switch that might be 10 degrees one way or the other sometimes, yes, in a pinch to get the heat on. But I don't recommend leaving it there. Replace it with the correct one soon. They aren't that expensive to risk using the wrong one for more than temporary heat.

Updated on March 26, 2018

Original Article:

How to Replace the Fan Limit Switch in a Furnace
By Dan Robbins