I've been having trouble with my heater. When I turn it on, I only get cold air blowing even though the temperature is set at 71. I checked the heater out and noticed the Honeywell Smart Valve's indicator light wasn't blinking constantly. I looked it up and it says that the pressure switch (I have a single pressure switch) is open and should be closed.

This is where I need help. What do I have to do in order to close the pressure switch?

Thanks for your help in Advance,

Mike