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25 200066-01A
Problem Possible Cause Corrective Action
ODS/pilot lights but flame
goes out when control
knob is released.
1. Control knob is not fully
pressed in.
2. Control knob is not pressed
in long enough.
3. Equipment shutoff valve is
not fully open.
4. Thermocouple connection is
loose at control valve.
5. 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
6. Thermocouple damaged.
7. Control valve damaged.
1. Press in control knob fully.
2. After ODS/pilot lights, keep
control knob pressed in 30
seconds.
3. Fully open equipment shutoff
valve.
4. Hand tighten until snug, and
then tighten 1/4 turn more.
5. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Care and Maintenance ,
page 23) or replace ODS/
pilot assembly
6. Replace thermocouple.
7. Replace control valve.
Burner does not light after
ODS/pilot is lit.
1. Burner orifice is clogged.
2. Burner orifice diameter is too
small.
3. Inlet gas pressure is too low.
1. Clean burner orifice (see
Care and Maintenance ,
page 23) or replace burner
orifice.
2. Replace burner orifice.
3. Contact local gas supplier.
Delayed ignition of
burner.
1. Manifold pressure is too low.
2. Burner orifice is clogged.
1. Contact local gas supplier.
2. Clean burner (see Care and
Maintenance
, page 23) or
replace burner orifice.
Burner backfiring during
combustion.
1. Burner orifice is clogged or
damaged.
2. Burner is damaged.
3. Gas regulator is damaged.
1. Clean burner orifice (see
Care and Maintenance ,
page 23) or replace burner
orifice.
2. Replace burner.
3. Replace gas regulator.
Yellow flame during burn-
er combustion.
1. Not enough air.
2. Gas regulator is defective.
3. Inlet gas pressure is too low.
1. Check burner for dirt and
debris. If found, clean burner
(see
Care and Maintenance
,
page 23).
2. Replace gas regulator.
3. Contact local gas supplier.
Gas odor during com-
bustion.
1. Foreign matter between
control valve and burner.
2. Gas leak. (See Warning
Statement at top of page 24).
1. Contact a qualified service
technician to remove foreign
matter.
2. Locate and correct all leaks
(see Checking Gas Connec-
tions , page 17).
TROUBLESHOOTING