PROBLEM
Burner backfi ring
during combustion.
High yellow fl ame
during burner
combustion
Gas odor during
combustion.
Heater produces a
clicking/ticking noise
just after burner is lit
or shut off .
Heater shuts off in
use (ODS operates).
Gas odor exists
even when control
knob is in OFF posi-
tion.
Moisture/conden-
sation noticed on
windows.
Slight smoke or odor
during initial opera-
tion
POSSIBLE CAUSE
1. Burner orifi ce is clogged or
damaged.
2. Burner is damaged.
3. Gas regulator is damaged.
1. Not enough air.
2. Gas regulator is defective.
1. Foreign matter between
control valve and burner.
2. Gas leak. (See Warning
Statement on page 2).
1. Metal is expanding while
heating or contracting
while cooling.
1. Not enough fresh air is
available.
2. Low line pressure.
3. ODS/pilot is partially
clogged.
1. Gas leak. See Warning
Statement on page 2.
2. Control valve is
defective.
1. Not enough combustion/
ventilation air.
1. Residues from
manufacturing process.
CORRECTIVE ACTION
1. Clean burner orifi ce (see Care and
Maintenance on page 9) or contact
customer service.
2. Contact qualifi ed service technician.
3. Contact qualifi ed service technician.
1. Check burner for dirt and debris. If found,
clean burner (see see Care and
Maintenance on page 9).
2. Contact qualifi ed service technician.
1. Contact qualifi ed service technician.
2. Locate and correct all leaks.
1. This is common with most heaters. If
noise is excessive, contact qualifi ed
service technician.
1. Open window and/or door for
ventilation.
2. Contact qualifi ed service technician.
3. Clean ODS/pilot (see Care and
Maintenance on page 9).
1. Locate and correct all leaks (see
"Checking Gas Connections" page 4).
2. Contact qualifi ed service technician.
1. Refer to "Air for Combustion and
Ventilation" requirements, page 4.
1. Problem will stop after a few hours of
operation.
NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
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