Desa Comfort Glow CGN10RL Owner's Operation And Installation Manual page 13

TROUBLESHOOTING
Continued
OBSERVED PROBLEM
ODS/pilot lights but flame goes out when
control knob is released
Burner(s) does not light after ODS/pilot is
lit
Delayed ignition of burner(s)
Burner backfiring during combustion
Burner plaque(s) does not glow
Slight smoke or odor during initial opera-
tion
Heater produces a clicking/ticking noise
just after burner is lit or shut off
103549
POSSIBLE CAUSE
1. Control knob not fully pressed in
2. Control knob not pressed in long enough
3. Manual shutoff valve not fully open
4. Thermocouple connection loose at
control valve
5. Pilot flame not touching thermocouple,
which allows thermocouple to cool,
causing pilot flame to go out. This
problem could be caused by one or both
of the following:
A) Low gas pressure
B) Dirty or partially clogged ODS/pilot
6. Thermocouple damaged
7. Control valve damaged
1. Burner orifice(s) is clogged
2. Burner orifice(s) diameter is too small
3. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice(s) is clogged
1. Burner orifice(s) is clogged or damaged
2. Burner damaged
3. Gas regulator defective
1. Plaque damaged
2. Inlet gas pressure is too low
3. Control knob set between locked
positions
1. Residues from manufacturing processes
1. Metal expanding while heating or
contracting while cooling
13
OWNER'S MANUAL
REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 10 seconds
3. Fully open manual shut-off valve
4. Hand tighten until snug, then tighten 1/4
turn more
5. A) Contact local natural gas company
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 15) or replace
ODS/pilot assembly
6. Replace thermocouple
7. Replace control valve
1. Clean burner orifice(s) (see Cleaning
and Maintenance, page 15) or replace
burner orifice(s)
2. Replace burner orifice(s)
3. Contact local natural gas company
1. Contact local natural gas company
2. Clean burner orifice(s) (see Cleaning
and Maintenance, page 15) or replace
burner orifice(s)
1. Clean burner orifice(s) (see Cleaning
and Maintenance, page 15) 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. Problem will stop after a few hours of
operation
1. This is common with most heaters. If
noise is excessive, contact qualified
service person
Continued