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GAS RESIDENTIAL HEATERS
TROUBLE
SHOOTING
Continued
OBSERVED PROBLEM
Burner does not light after ODS/pilot is lit
Delayed ignition of burner
Burner backfiring during combustion
Yellow flame during burner combustion
Slight smoke or odor during initial opera-
tion
Heater produces a whistling noise when
burner is lit
®
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 manufacturing processes
1. Turning control knob to HI position
when burner is cold
2. Air in gas line
3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice
REMEDY
1. Clean burner (see Cleaning and
2. Replace burner orifice
3. Contact local propane/LP company
1. Contact local propane/LP company
2. Clean burner (see Cleaning and
1. Clean burner (see Cleaning and
2. Replace burner
3. Replace gas regulator
1. Check burner for dirt and debris. If
2. Replace gas regulator
1. Problem will stop after a few hours of
1. Turn control knob to LO position and
2. Operate burner until air is removed from
3. Observe
4. Clean burner (see Cleaning and
18
Maintenance, page 16) or replace burner
orifice
Maintenance, page 16) or replace burner
orifice
Maintenance, page16) or replace burner
orifice
found, clean burner (see Cleaning and
Maintenance, page 16)
operation
let warm up for a minute
line. Have gas line checked by local
propane/LP company
minimum
installation
clearances (see Figure 10, page 8)
Maintenance, page 16) or replace burner
orifice
103507
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