Recently, I had a call with a homeowner complaining about no heat. After some quick checks, it turned out to be a faulty limit switch on their furnace. I’d love to hear what specific diagnostic steps you all take when dealing with similar situations. Any tools or tips that help you pin down the issue faster?
, this drives me nuts too! For no-heat issues, I always check the power first and make sure the thermostat’s not set to ‘cool’ by mistake — I’ve seen that bite people more than once. I totally agree on the diagnostic steps; having a good multimeter really makes a difference.
For no-heat situations, I can’t stress enough the importance of checking the pressure switch along with the limit switch. Sometimes it’s the simple things that get overlooked. Do you have a go-to method for checking those, or do you use a multimeter like I do?