What takes so long?

Looking for reasons why some gas heating units take a long time to fire up after testing the disconnect & pressure switch? Some seem to take between 1-4 minutes. Any thoughts are appreciated.

You most likely interrupted the control board brain it has to re boot

How are you testing the “Pressure Switch”

by pulling the hose off:twisted:

Some have a programmed delay.

Have put them on when one was loose OR replacing diaphragm valve but never pulled one off in a visual home inspection

Me neither;-) if the furnace fires the pressure switch is working if the furnace does not fire it could be one of numerous safeties and or the gas valve. Not my problem the furnace did not perform as the MFG intended :wink:

Exactly … So could not figure out why he was doing that.

Just busy work Dan just busy work no meaningful purpose!!!