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Page 17
PROBLEM POSSIBLE CAUSE WHAT TO DO
Burner backfiring
during operation
Burner plague(s)
does not glow
Slight smoke and odor
during initial operation
Heater produces a
whistling noise when
burner is lit.
Heater produces a
clicking noise just
after burner is lit or
turned off.
Gas odor even when
control knob is in OFF
position.
Gas odor during
combustion
Heater shuts off
on ODS
1. Burner orifice(s) is
clogged or damaged.
2. Burner damaged.
3. Gas regulator defective.
1. Plaque(s) is damaged.
2. Inlet gas pressure is too low.
3. Control knob set between
locked positions.
1. Residues from
manufacturing processes.
1. Air passageways blocked.
2. Air in gas line
1. Metal expanding and
contracting, respectively.
1. Gas leaks. See front page
Warnings.
2. Gas control defective
1. Foreign matter in gas or on
burner ports.
2. Heater burning vapors from
paint, impurities in air.
3. Gas leaks. See front page
Warnings.
1. Not enough fresh air is
available.
2. Low gas pressure
3. ODS pilot partially clogged.
1. Clean burner orifice(s) or
replace burner orifice(s).
2. Replace burner.
3. Replace gas regulator.
1. Replace burner.
2. Contact local natural gas
company.
3. Turn control knob until it
locks at desired setting.
1. Will stop after a few
hours of operation.
1. Check minimum
installation clearances
and air passageways for
debris.
2.Operate burner until the
air is completely purged.
1. This is common with
heaters. If noise is
excessive, contact a
qualified person.
1. Locate and correct leaks
immediately.
2. Replace gas control
1. Check gas passage way
and burner.
2. Ventilate room, stop
storing and using odor
causing products near the
heater.
3. Locate and correct
leaks immediately.
1. Open window.
2. Contact your gas
company.
3. Clean the pilot.