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108795-01V 23
TROUBLESHOOTING
Note: Before troubleshooting the system, make sure the gas shutoff valve is ON. The two
most common causes of a malfunctioning gas appliance are:
1. Loose wiring connections
2. Construction debris clogging pilot and/or gas control valve lter
OBSERVED PROBLEM
Pilot will not light
Pilot will not stay lit
No gas to burner, although wall
switch and valve are set to the
ON position
Frequent pilot outage
POSSIBLE CAUSE
1. No gas supply or shutoff
valve is OFF
2. Air in gas line
3. Construction debris clog-
ging pilot orice
4. Low gas pressure
5. Control valve knob is not on
the PILOT position
6. Kinked pilot line
7. Bad valve
8. Vent damper not fully
open
1. Loose wiring on thermopile
to regulator valve. No mil-
livolt current is being sent
back to regulator
2. If valve knob and wall
switch are in the ON posi-
tion, probable defective
regulator valve
3. Vent damper not fully
open
1. Wall switch wires defective
or too long
2. Thermopile not generating
sufcient voltage
1. Pilot ame may be too low,
causing safety pilot to “drop
out”
2. Improper venting or exces-
sive blockage
REMEDY
1. Check to see if you have
gas supply
2. Hold regulator control valve
in the PILOT position for 2
to 3 minutes to purge air. If
you smell gas stop and wait
for a few minutes before
trying to light replace
3. Remove debris and dirt,
inspect and clean any other
possible obstructions
4. Contact your gas supplier
5. Refer to section on pilot
lighting
6. Have a qualied technician
replace pilot line
7. Replace regulator valve (see
Accessories, page 31)
8. Open vent damper until fully
locked in OPEN position
1. Check wiring connections.
Refer to wiring diagram
shown in Wall Switch Instal-
lation, page 11
2. Have a qualied technician
replace valve
3. Open vent damper until fully
locked in OPEN position
1. Check electrical connec-
tions
2. See Pilot will not stay lit,
above
1. Clean and adjust pilot ame
for maximum flame im-
pingement on thermopile
2. Have vent system inspect-
ed, including termination
cap. Remove any restric-
tion or obstruction