24
TROUBLESHOOTING
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.
5. Thermocouple damaged.
6. Control valve damaged.
7. Wrong gas setting.
1. Press in control knob fully.
2. After ODS/pilot lights, keep control
knob pressed in 30-60 seconds.
3. Fully open equipment shutoff valve.
4. Hand tighten until snug, and then
tighten ¼ turn more.
5. Replace thermocouple.
6. Contact customer service.
7. Correct gas selection.
Burner(s) does not
light after ODS/pilot
is lit.
1. Thermostat setting too low.
2. Burner orifice is clogged.
3. Burner orifice diameter is
too small.
4. Inlet gas pressure is too low.
1. Turn thermostat knob to a higher setting.
2. Clean burner orifice (see Care and
Maintenance, page 22) or contact
customer service.
3. Contact customer service.
4. Contact your gas supplier.
Delayed ignition of
burner(s).
1. Manifold pressure is too low.
2. Burner orifice is clogged.
1. Contact your gas supplier.
2. Clean burner (see Care and
Maintenance, page 22) or contact
customer service.
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 22 or contact
customer service.
2. Contact dealer or customer service.
3. Replace gas regulator.
High yellow flame
during burner
combustion
1. Not enough air.
2. Gas regulator is defective.
3. Wrong gas type selected.
1. Check burner for dirt and debris. If found, clean
burner (see Care and Maintenance, page 22).
2. Replace gas regulator.
3. See Gas Selection, page 11.
Gas odor during
combustion.
1. Foreign matter between
control valve and burner.
2. Gas leak. (See Warning
Statement at top of page 23).
1. Take apart gas tubing and remove foreign
matter.
2. Locate and correct all leaks (see
“Checking Gas Connections,” page 17).
Heater produces a
clicking/ticking noise
just after burner is lit
or shut off.
1. Metal is expanding while
heating or contracting
while cooling.
1. This is common with most heaters. If
noise is excessive, contact qualified
service technician.
