15
Installation Instructions and Owner’s Manual
Unvented Natural Gas Vent Free Room Heaters
OBSERVED SYMPTOM
POSSIBLE CAUSE
REMEDY
Burner does not light after
ODS/pilot is lit
Burner orifice is clogged
Clean burner orifice (see Cleaning and Maintenance on page
11), or replace burner orifice
Burner orifice diameter to small
Replace burner orifice
Inlet gas pressure is too low
Contact local gas company
Delayed ignition of burner
Manifold pressure is too low
Contact local gas company
Burner orifice is clogged
Clean burner orifice (see Cleaning and Maintenance on page
11), or replace burner orifice
Burner backfiring during
operation
Burner orifice is clogged or damaged
Clean burner orifice (see Cleaning and Maintenance on page
11), or replace burner orifice
Burner damaged
Replace burner
Gas regulator defective
Replace gas regulator
Burner plaque(s) does not
glow [Infrared Only]
Plaque damaged
Replace burner
Control knob set between locked
positions
Turn control knob until it locks at desired setting.
Inlet gas pressure is too low
Replace gas regulator
Slight smoke or odor
during initial operation
Residues from manufacturing process
Problem will stop after a few hours of operation
Heater produces a
whistling noise when
burner is lit
Turning control knob to HI position when
burner is cold
Turn control knob to LO position and let warm up for a minute
Air in gas line
Operate burner until air is removed from line have gas line
checked by local gas company
Air passageways on heater blocked
Observe minimum installation clearances (see Figure 4 page 6)
Dirty or partially clogged burner orifice.
Clean burner orifice (see Cleaning and Maintenance on page
11), or replace burner orifice
White powder residue
forming within burner box
or on adjacent walls or
furniture
When heated, vapors from furniture
polish, wax, carpet cleaners, etc., turn
into white powder residue
Turn heater off when using furniture polish, wax, carpet cleaner
or similar products
Heater produces unwanted
odors.
Heater burning vapors from paint,
hair spray, glues, etc. See IMPORTANT
statement on page 14
Ventilate room. Stop using odor-causing products while heater
is running.
Gas leak. See WARNING statement at top
of page 14
Locate and correct all leaks (see Checking Gas Connections,
page 9)
Heater shuts off in use
(ODS operates)
Not enough fresh air is available
Open window and/or door for ventilation
Low line pressure
Contact local gas company
ODS/pilot is partially clogged
Clean ODS/pilot (see Cleaning and Maintenance, page 11)
Gas odor even when
control knob is in OFF
position
Gas leak. See WARNING statement at top
of page 14
Locate and correct all leaks (see Checking Gas Connections,
page 9)
Control valve is defective
Replace control valve
Gas odor during
combustion
Foreign matter between control valve
and burner
Take apart gas tubing and remove foreign matter
Gas leak. See WARNING statement at top
of page 14
Locate and correct all leaks (see Checking Gas Connections,
page 9)
Heater produces a clicking/
ticking noise just after
burner is lit or shut off
Metal expanding while heating or
contracting while cooling
This is common with most heaters. If noise is excessive, contact
qualified service person
Moisture/condensation
noticed on windows
Not enough combustion/ventilation air
Refer to Fresh Air for Combustion and Ventilation page 3
through 5.
