Desa Comfort Glow CGB3924NRA Owner's Operation And Installation Manual page 20

UNVENTED NATURAL GAS LOG HEATER
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
Burner does light after ODS/pilot is lit
Delayed ignition burner
Burner backfiring during combustion
Slight smoke or odor during initial operation
Moisture/condensation noticed on windows
Heater produces a whistling noise when
burner is lit
White powder residue forming within burner
box or on adjacent walls or furniture
Remote does not function
POSSIBLE CAUSE
1. Burner orifice clogged
2. Inlet gas pressure is too low
3. Burner orifice diameter is too small
4. Thermopile leads disconnected or im-
properly connected
5. Burners will not come on in remote
position
1. Manifold pressure is too low
2. Burner orifice clogged
1. Burner orifice is clogged or damaged
2. Damaged burner
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
3. Residues from manufacturing processes
and logs curing
1. Not enough combustion/ventilation air
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
1. When heated, vapors form furniture pol-
ish, wax, carpet cleaners, etc. turn into
white powder residue
1. Battery is not installed. Battery power
is low
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20
REMEDY
1. Clean burner (see Cleaning and Mainte-
nance, page 18) or replace burner orifice
2. Contact local natural gas company
3. Replace burner orifice
4. Reconnect leads (see Wiring Diagram,
page 27)
5. Replace battery in transmitter and receiver
1. Contact local natural gas company
2. Clean burner (see Cleaning and Mainte-
nance, page 18) or replace burner orifice
1. Clean burner (see Cleaning and Mainte-
nance, page 18) or replace burner orifice
2. Replace damaged burner
3. Replace gas control
1. Check burner for dirt and debris. If
found, clean burner (see Cleaning and
Maintenance, page 18)
2. Replace gas control
3. Problem will stop after a few hours of
operation
1. Refer to Air for Combustion and Venti-
lation requirements (page 4)
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 gas company
3. Observe minimum installation clear-
ances (see pages 7 through 9)
4. Clean burner (see Cleaning and Mainte-
nance, page 18) or replace burner orifice
1. Turn heater off when using furniture
polish, wax, carpet cleaners or similar
products
1. Replace 9-volt batteries in receiver and
remote control
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