I am getting a weird smell out of the large intake vent in the hallway and according to the system led light code I have an open high limit device. I don't know what that means or if it is a sensor that needs to be replaced, where it is. Looking for a little help

Working on an older bryant furnace was off on ahigh temp limit shouldn't blower still come on to help close limit

Im replacing my limit switch which is located in the heat exchanger. What does a high limit switch actually do? Thanks.

We have an Ultra V Tech 80 furnace. Cold air is coming out and the ignitors are not lit. Light is blinking 4 times which means high limit open. Where is this at? What needs to be done?

My son was told by his school principal that if he does not finish his requirements this year he will not be allowed to graduate with a diploma. He had back surgery which caused him to miss a semester about 18 months ago. This is his fifth year and will be 20 next year. I have never heard of being...