Furnace blowing cold air only
Hi, I have a 1995 Prowler 22' and it seems like the furnace is only blowing cold air. It does state there is an AUTO Igniter but I can't see the pilot or flame or smell gas.
Forum Discussion
T-stat closes sending DC to furnace
Furnace Blower starts and comes up to speed......purge cycle to clear combustion chamber
SAIL SWITCH MUST close before DC will continue thru circuits for gas valve/spark electrode operation
SAIL SWITCH...has a 'paddle' that sticks out into fan blower chamber.
Air flow moves paddle closing the micro switch allowing DC to continue
Sail Switch gets dirty/sticks/fails.....no matter how long fan runs Sail Switch MUST close for furnace to light off main flame via spark electrode
Sail Switch typically has 2 wire wires....12VDC+ In/OUT of switch
Switch can be under cover over motor of next to blower area
Furnace Blower starts and comes up to speed......purge cycle to clear combustion chamber
SAIL SWITCH MUST close before DC will continue thru circuits for gas valve/spark electrode operation
SAIL SWITCH...has a 'paddle' that sticks out into fan blower chamber.
Air flow moves paddle closing the micro switch allowing DC to continue
Sail Switch gets dirty/sticks/fails.....no matter how long fan runs Sail Switch MUST close for furnace to light off main flame via spark electrode
Sail Switch typically has 2 wire wires....12VDC+ In/OUT of switch
Switch can be under cover over motor of next to blower area
