Desa VSGF28NTF Owner's Operation And Installation Manual page 24

OBSERVED PROBLEM
ODS/pilot lights but flame
goes out when control knob
is released
One or both burners do not
light after ODS/pilot is lit
Delayed ignition of one or
both burners
Burner backfiring during
combustion
Yellow flame in front burner
during burner combustion
24
TroUbleshooTinG
Continued
POSSIBLE CAUSE
1. C o n t r o l k n o b n o t f u l l y
pressed in
2. Control knob not pressed in
long enough
3. Equipment shutoff valve not
fully open
4. Pilot flame not touching
thermocouple, which allows
thermocouple to cool, caus-
ing 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
5. Thermocouple connection
loose at control valve
6. Thermocouple damaged
7. Control valve damaged
8. Safety interlock system has
been triggered
1. Inlet gas pressure is too
low
2. Burner orifice(s) clogged
3. Mislocated crossover tube
1. Manifold pressure is too
low
2. Burner orifice(s) clogged
3. Mislocated crossover tube
1. Burner orifice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
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REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep
control knob pressed in 30
seconds
3. Fully open equipment shut-
off valve
4. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning, page 21) or re-
place ODS/pilot assembly
5. Hand tighten until snug,
then tighten 1/4 turn more
6. Replace pilot assembly
7. Replace control valve
8. Wait one minute for safety
interlock system to reset.
Repeat ignition operation.
1. Contact local natural or
propane/LP gas company
2. Clean burner(s) (see Clean-
ing, page 21) or replace
burner orifice(s)
3. Contact qualified service
person
1. Contact local natural or
propane/LP gas company
2. Clean burner(s) (see Clean-
ing, page 21) or replace
burner orifice(s)
3. Contact qualified service
person
1. Clean burner (see Clean-
ing, page 21) or replace
burner orifice(s)
2. Replace damaged burner
3. Replace gas regulator
1. Check burner(s) for dirt
and debris. If found, clean
burner(s) (see Cleaning,
page 21)
2. Replace gas regulator
119303-01E