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27
100750
OBSERVED
PROBLEM
When control knob is
pressed in and turned
to the PILOT/IGN
position, there is spark
at ODS/pilot but no
ignition (non-thermo-
stat model only).
When ignitor button is
pressed in, there is a
spark at ODS/pilot but
no ignition (thermo-
stat models only).
ODS/pilot lights but
flame goes out when
control knob is
released
TROUBLE-
SHOOTING
Continued
REMEDY
1. Turn on gas supply or
open manual shutoff
valve.
2. Fully press in control
knob while turning to PI-
LOT/IGN position (non-
thermostat models only).
Fully press in thermostat
control knob while press-
ing ignitor button (ther-
mostat models only).
3. Continue holding down
control knob. Repeat
igniting operation until
air is removed.
4. Clean ODS/pilot (see
Cleaning and Mainte-
nance, page 26) or
replace ODS/pilot
assembly.
5. Replace gas regulator.
6. Turn thermostat 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 manual shut-
off valve.
4. Hand tighten until snug,
then tighten 1/4 turn
more.
5. A) Contact local natural
gas company.
B) Clean ODS/pilot (see
Cleaning and Mainte-
nance, page 26) or
replace ODS/pilot
assembly.
6. Replace thermocouple.
7. Replace control valve.
8. Wait one minute for
safety interlock system
to reset. Repeat ignition
operation.
POSSIBLE
CAUSE
1. Gas supply turned off or
manual shutoff valve
closed.
2. Control knob not fully
pressed in while being
turned to PILOT/IGN
position (non-thermostat
models only).
Thermostat control knob
not fully pressed in while
pressing ignitor button
(thermostat models only).
3. Air in gas lines when
installed.
4. ODS/pilot is clogged.
5. Gas regulator setting is
not correct.
6. Thermostat control knob
not in pilot position
(thermostat models only).
1. Control knob not fully
pressed in.
2. Control knob not pressed
in long enough.
3. Manual shutoff valve not
fully open.
4. Thermocouple connection
loose at control valve.
5. Pilot flame not touching
thermocouple, which
allows 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.
8. Safety interlock system
has been triggered
(thermostat models only).
Continued