Troubleshooting Your Heater - Williams 0656542.9 Owner's Manual

Troubleshooting Your Heater

SYMPTOM
1. No spark at ODS pilot when
igniter button is pressed.
2. Spark at ODS pilot but no
ignition when igniter button is
pressed.
3. Pilot is lit but burner does not
ignite.
4. Delayed ignition of burner.
5. ODS pilot lights but does not
remain lighted when control
knob is released.
6. Burner backfiring during
combustion.
7. Yellow flame during burner
combustion. Do not operate in
this condition. See Carbon
Monoxide warning on page 12.
8. Slight smoke or odor during
initial operation.
9. Heater produces a
clicking/ticking noise just after
burner is lit or shut off.
10. Heater produces unwanted
odors.
POSSIBLE CAUSE
A. Igniter electrode positioned wrong.
B. Igniter electrode broken.
C. Igniter electrode not connected to
igniter cable.
D. Igniter cable pinched or wet.
E. Piezo igniter is loose.
F. Broken igniter cable.
G. Bad Piezo igniter.
A. Gas supply turned off or manual
shutoff valve closed.
B. Control knob not in PILOT position.
C. Control knob not pressed in while in
PILOT position.
D. Air in gas lines when installed.
E. ODS pilot is clogged.
F. Gas regulator setting not correct.
A. Burner orifice is clogged.
B. Inlet gas pressure is too low.
A. Manifold pressure is too low.
B. Burner orifice is clogged.
A. Control knob not fully pressed in.
B. Control knob not pressed in long
enough.
C. Safety interlock system has been
triggered.
D. Manual shutoff valve not fully open.
E. Thermocouple connection loose at
control valve.
F. Low gas pressure.
G. Dirty or clogged pilot.
H. Thermocouple damaged.
I. Control valve damaged.
A. Burner orifice is clogged or damaged.
B. Burner damaged.
C. Gas regulator defective.
A. Not enough air.
B. Gas regulator defective.
A. Residues from manufacturing
processes.
A. Metal expanding while heating or
contracting while cooling.
A. Heater burning vapors from paint, hair
spray, glue, etc.
B. Gas leak.
CORRECTIVE ACTION
Replace ODS pilot assembly.
Replace ODS pilot assembly.
Reconnect igniter cable.
Free igniter cable if pinched. Keep dry.
Press piezo igniter to valve located inside
heater cabinet top.
Thermostat models – Replace igniter cable.
Manual models - Replace valve.
Thermostat models - Replace piezo igniter.
Manual models - Replace valve
Turn on gas supply or open manual shutoff
valve.
Turn control knob to PILOT position.
Press in control knob while in PILOT
position.
Hold down control knob. Repeat igniting
operation until air is removed.
Clean ODS pilot or replace ODS pilot
assembly.
Replace gas regulator.
Clean burner or replace burner orifice.
Contact local gas company.
Contact local gas company. Replace
regulator.
Clean burner.
Press control knob in fully.
After pilot lights, keep control knob pressed
in 30 seconds.
Wait one (1) minute for safety interlock
system to reset. Repeat ignition operation.
Open valve.
Hand tighten until snug, then tighten 1/4
turn more.
Contact local gas company.
Clean pilot or replace pilot assembly.
Replace ODS pilot assembly.
Replace.
Clean burner or replace burner orifice.
Replace.
Replace.
Check burner for dirt. Clean.
Replace gas regulator.
Problem will stop after a few hours of
operation.
This is common in most heaters. If noise is
excessive, contact qualified service
technician.
Ventilate room. Stop using odor causing
products while heater is on.
Locate and correct all leaks.
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