Furnace flame out
Furnace flame out
(OP)
I had a call on a gaspak at a lake house. The unit faces the lake. After a night of 35 mph sustained winds and high gusts the unit had a flame out. The unit is spark ignited with a combustion fan. Upon arrival combustion fan was running but burners were not. I checked all controls and everything appeared to be in working order. Turn the thermastat fan to on and fan worked. Turn thermastat off and back on and unit fired and ran fine. Is it possible for high winds to extinguish the burners and not allow them to light the second time causing unit to go into lock out?





RE: Furnace flame out
Yes, it's possible for high winds to snuff the flame out, and I would think that flame failure would cause a manual-reset condition if the controls are designed properly. You'll have to look into the manufacturer's control sequence to find out for certain though.
Larger boilers work that way. The lock-out is to prevent operation until somebody can visually determine that the igniter works OK.
Let us know what you determine!
Old Dave
RE: Furnace flame out
It could have been this switch, or it could have been as DRWeig said, and the flame blew out. Once the flame sensor stopped seeing a flame, it would have shut the gas valve. Either way, it sounds like you fixed it.
---KenRad
RE: Furnace flame out