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Removing Furnace Access Cover
6 . Set thermostat to desired temperature and
it will cycle the furnace on and off as the tem-
perature inside the MotorHome satisfies the
thermostat .
If furnace is noisy, rumbling burner or smoke
or carbon at exhaust vent-
1 . Faulty or broken electrode .
2 . Improper primary air adjustment .
If thermostat calls for heat and furnace blower
does not start-
1 . Depress manual reset button .
2 . Blown fuse . Check fuse ir% furnace and also
fuse located in living area electrical compart-
ment .
3 . Dead auxiliary (living area) battery or
loose wiring.
Blower runs for 30-60 seconds, then stops and
requires manual reset before it will restart .
Burner does not ignite-
1 . LP gas tank low or empty.
2 . LP gas tank valve or furnace manual valve
closed.
3 . Low voltage at furnace.
4 . Loose electrical connection at electrode.
5 . Faulty or broken electrode.
Blower runs 30-60 seconds, then stops and
requires manual reset before it will restart.
Burner does ignite-
1 . Low fuel pressure.
2 . Faulty flame switch .
3 . Insufficient primary air.
4 7
Furnace Primary Air Adjustment
NOTE :
Before pressing the reset button to reset
the control circuit, a wait of 5 minutes is re-
quired, after the furnace has stopped, before the
thermal relay will properly reset.
PRIMARY AIR ADUSTMENT
Access to the burner assembly to adjust pri-
mary air is located at the bottom, right side of
the furnace compartment by removing access
cover.
NOTE : To
gain access to right side of furnace, if
vehicle is equipped with a davo, squeeze levers
located under center of davo seat and raise seat.
1 . Loosen hex lock nut slightly until burner
adjusting rod can be turned with a screwdriver.
2 . Start furnace and watch burner through sight
glass view port in plenum. Decrease primary air
to give a slightly yellow flame with green cones.
The cones are formed at each of the ports in the
burner . Then increase air slowly until the yellow
disappears and the cones become sharply defined
as blue.
NOTE :
The total adjustment available, from one
extreme to the other, is only about
r/4
turn . Do
not force adjusting rod past the stops.
3 . Hold the adjusting rod in place and tighten
the hex nut.
4. Recheck flame to see that it is still properly
adjusted.
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