Have HVAC Questions? Ask an HVAC Expert for Answers
My name is***** see your question stumped the panel here.
I just logged on and saw you had not received an answer yet.
I am willing to help you if you still need assistance. Just let me know how the project is going and I can help you or close this question for you.
Once again I apologize for the delay.
can you tell if the exhaust fan motor is running?
What happens is the exhaust is supposed to start first
Then the air it creates closes a small air switch...this switch must close before anything else happens.
The first item to check is if the exhaust fan is running or not...and if not is it warm/hot?
thank you...is the furnace exhaust vented in a metal pipe to a chimney or out the side of the house in pvc pipe?
Are you familiar with the pressure switch?...and if not supply a model number so I can supply pic
pull the rubber tube and check for cracks..trim if necessary. Use a paperclip or small nail and poke the tube fitting on furnace clear all the way through. Make sure nothing in chimney pipe....
does your pressure switch have 2 wires attached?
do this exactly..
remove the 2 wires from pressure switch and hold apart
AFTER the exhaust fan starts running..touch and hold the 2 wires together metal to metal.
Tell me if it tries to ignite
then you have an open safety or board issue. What is the model number
and is there a code blinking on the circuit board?
see page 32 HERE
then either the board is bad
the exhaust is not running
or it is operating.
The steady lights mean normal and the yellow light solid means flame present