Hi, I have a high efficient furnace(carrier 58msa). The furnace will not fire up. The house fan comes on first. The inducer fan should run first and then the required sequence should then follow. I have checked the thermostat, it is OK. The other thing I need to check is the pressre switch. I am getting 24v there. I have not checked through the switch. Am I on the right track?

Thanks

blackpirate

If you shut it off and turn it back on the blower will run first if your thermostat is calling for heat then the inducer motor then your hot surface ignitor