1 6
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
B urner(s) do es n ot ligh t after
ODS/pilot is lit.
Delayed ignition of burner(s).
Burner backfiring during combustion.
Yellow flame during burner
combustion.
Slight smoke or odor during
initial operation.
Heater produces a whistling noise
when the burner is lit.
W hite powder residue forming
within burner box or on adjacent
walls or furniture.
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 is damaged.
3. Gas regulator is defective.
1. Not enough air.
2. Gas regulator is defective.
1. Residues from manufacturing
processes.
1. Turning control knob to Hl position
when burner is cold.
2. Air is in the gas line.
3. Air passageways on the heater
are blocked.
4. Dirty or partially clogged burner
orifice.
1. When heated, vapors from
furniture polish, wax, carpet
cleaners, etc. turn into a white
powder residue.
REMEDY
1. Clean burner orifice (see Cleaning
and Maintenance) or replace
burner orifice.
2. Replace burner orifice.
3. Contact local natural or propane/
LP gas company.
1. Contact local natural or
propane/LP gas company.
2. Clean burner (see
Cleaning and
M a in t e n a n c e
) o r r e p la c e
burner orifice.
1. Clean burner orifice (see Clean
ing and Maintenance ) or replace
burner.
2. Replace burner.
3. Replace gas regulator.
1. Check burner for dirt and debris. If
found, clean burner (see Cleaning
and Maintenance).
2. Replace gas regulator.
1. Problem will stop after a few hours
of operation.
1. Turn control knob to LO position
and let warm up for a minute.
2. Operate burner until air is removed
from line. Have gas line checked
by local natural or propane/LP
gas company.
3. Observe minimum installation
clearances.
4. Clean burner (see
Cleaning and
Maintenance
) or replace burner
orifice.
1. Turn heater off when using
furniture polish, wax, carpet
cleaner or similar products.
