www.desatech.com
108660-01E
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
. Air in gas line
3. Construction debris clog-
ging pilot orifice
4. Low gas pressure
5. Control valve knob is not
on the PILOT position
6. Kinked pilot line
7. Bad valve
1. Loose wiring on thermopile
to regulator valve. No mil-
livolt current is being sent
back to regulator
. If valve knob and wall
switch are in the ON posi-
tion, probable defective
regulator valve
1. Wall switch wires defective
or too long
. Thermopile not generating
sufficient voltage
1. Pilot flame may be too
low, causing safety pilot
to “drop out”
. Improper venting or exces-
sive blockage
REMEDY
1. Check to see if you have
gas supply
. Hold regulator control valve
in the PILOT position for to
3 minutes to purge air. If you
smell gas stop and wait for a
few minutes before trying to
light the fireplace
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 qualified technician
replace pilot line
7. Replace regulator valve (see
Accessories
, page 25)
1. Check wiring connections.
Refer to wiring diagram
shown in
Wall Switch In-
stallation
, page 10
2. Have a qualified technician
replace valve
1. Check electrical connec-
tions
. See
Pilot will not stay lit
,
above
1. Clean and adjust pilot flame
for maximum flame impinge
-
ment on thermopile
. Have the vent system in-
spected, including the ter
-
mination cap. Remove any
restriction or obstruction
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 the pilot and/or gas control valve filter
