|View single post by dkpd1581|
|Posted: Tue Jan 6th, 2009 08:08 pm||
|While checking the gas valve, also check your outdoor regulator at the tank. If you have a bad regulator, moisture build up in it, or low ambient temperatures you may find:
1. A frozen regulator which will cause intermittent operation
2. A defective regulator that is sticking or some other internal issue
3. Ambient temps so low that the pressure inside an otherwise semi full tank is insufficient across the regulator or indoor valve and will cause intermittent problems
4. Improper regulator installation (may be position sensitive in how its mounted)
If all else is good, suspect a tripped/open over temperature sensor ahead of the gas valve's 24VAC circuit or bad gas valve. Check both for continuity through the coil first and then check for 24 VAC to the coil during start up.
To answer your other question, a capacitor helps the indoor blower motor start up and then stays in the circuit to cause it to operate more efficiently (less amp draw = less $$).
Let us know, best of luck.
Last edited on Tue Jan 6th, 2009 08:12 pm by dkpd1581