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Note :
All
troubleshooting
items are listed in order of
operation.
OBSERVED PROBLEM
When ignitor button is pressed and
control knob is pressed in and turned
to the PILOT position, there is no
spark at ODS/pilot.
When ignitor button is pressed and
control knob is press in and turned to
the PILOT position, there is a spark
at ODS/pilot but no ignition.
ODS/pilot
lights but flame goes
out
when control knob is re-
leased.
TROUBLESHOOTING
WARNING: Only a qualified
service person should service and
repair heater.
POSSIBLE CAUSE
1. Ignitor electrode is positioned
wrong.
2. Ignitor electrode is broken.
3. Ignitor electrode is not connected
to ignitor cable.
4. Ignitor cable is pinched or wet.
5. Broken ignitor cable.
6. Bad piezo ignitor.
1. Gas supply turned off or equipment
shutoff valve is closed.
2. Control knob not fully pressed in
while pressing ignitor button.
3. Air in gas lines when installed.
4. ODS/pilot is clogged.
5. Gas regulator setting is not correct.
6. Control knob not in PILOT position.
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 is not touching
thermocouple,
This
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.
13
CAUTION:
wire, needle, or similar object to
clean ODS/pilot. This can damage
ODS/pilot unit.
1. Replace ignitor.
2. Replace ignitor.
3. Reconnect ignitor cable.
4. Free ignitor cable if pinched by
any
ignitor cable dry.
5. Replace ignitor cable.
6. Replace piezo ignitor.
1. Turn on gas supply of open
equipment shutoff valve.
2. Fully
while pressing ignitor button.
3. Continue holding down control
knob. Repeat igniting operation
until air is removed.
4. Clean ODS/pilot (see Cleaning and
Maintenance, Page 12) or re-
place ODS/pilot assembly.
5. Replace gas regulator.
6. Turn control knob to PILOT position.
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, then
tighten 1/4 turn more.
5.A)Contact local gas company.
allows
B) Clean ODS/pilot (see Cleaning
and Maintenance, Page 12) or
replace ODS/pilot assembly.
6. Replace thermocouple.
7. Contact Dealer or Williams
Furnace.
Never use a
REMEDY
metal
or
tubing. Keep
press
in
control
knob
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