22
099403
OBSERVED
PROBLEM
Burner does not light
after ODS/pilot is lit
Delayed ignition of
burner
Burner backfiring dur-
ing combustion
Yellow flame during
burner combustion
Slight smoke or odor
during initial opera-
tion
Heater produces a
whistling noise when
burner is lit
REMEDY
1. Clean burner orifice (see
Cleaning and Mainte-
nance, page 20) or replace
burner orifice
2. Replace burner orifice
3. Contact local propane gas
company
1. Contact local propane gas
company
2. Clean burner orifice (see
Cleaning and Mainte-
nance, page 20) or replace
burner orifice
1. Clean burner orifice (see
Cleaning and Mainte-
nance, page 20) or replace
burner orifice
2. Replace burner
3. Replace gas regulator
1. Check burner for dirt and
debris. If found, clean
burner (see Cleaning and
Maintenance, page 20)
2. Replace gas regulator
1. Problem will stop after a
few hours of operation
1. Turn control knob to
LOW position and let
warm up for a minute
2. Operate burner until air is
removed from line. Have
gas checked by local pro-
pane gas company
3. Observe minimum instal-
lation clearances (see
Figure 4, page 10)
4. Clean burner (see Clean-
ing and Maintenance,
page 20) or replace
burner orifice
POSSIBLE
CAUSE
1. Burner orifice is
clogged
2. Burner orifice diameter
is too small
3. Inlet gas pressure is
too low
1. Manifold pressure is
too low
2. Burner orifice is
clogged
1. Burner orifice is
clogged or damaged
2. Burner damaged
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
1. Residues from manu-
facturing processes
1. Turning control knob
to HIGH position
when burner is cold
2. Air in gas line
3. Air passageways on
heater blocked
4. Dirty or partially
clogged burner orifice
TROUBLE-
SHOOTING
Continued
