www.desatech.com
108861-01F
7
TROUbLESHOOTING
Note:
All troubleshooting items are listed in order of operation.
WARNING: Turn off heater and let cool before ser-
vicing. Only a qualified service person should service
and repair heater.
CAUtION: Never use a wire, needle, or similar object
to clean pilot. This can damage pilot unit.
POSSIBLE CAUSE
1. Ignitor electrode not connected to ignitor
cable
2. Ignitor cable pinched or wet
3. Piezo ignitor nut is loose
4. Broken ignitor cable
5. Bad piezo ignitor
6. Ignitor electrode broken
7. Ignitor electrode positioned wrong
1. Gas supply turned off or equipment
shutoff valve closed
2. Gas control knob not in PILOT posi
-
tion
3. Gas control knob not pressed in while in
PILOT position
4. Air in gas lines when installed
5. Depleted gas supply (propane/LP models
only)
6. Pilot is clogged
7. Gas regulator setting is not correct
1. Gas control knob not fully pressed in
2. Gas control knob not pressed in long
enough
3. Equipment shutoff valve not fully open
4. Pilot flame not touching thermocouple,
which allows thermocouple to cool,
causing pilot flame to go out. This prob
-
lem could be caused by one or both of
the following:
A) Low gas pressure
B) Dirty or partially clogged pilot
5. Thermocouple connection loose at con
-
trol valve
6. Thermocouple damaged
7. Control valve damaged
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
3. Tighten nut holding piezo ignitor. Nut is
located behind the mounting bracket
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace pilot assembly
7. Replace pilot assembly
1. Turn on gas supply or open equipment
shutoff valve
2. Turn gas control knob to PILOT posi
-
tion
3. Press in gas control knob while in PILOT
position
4. Continue holding down control knob.
Repeat igniting operation until air is
removed
5. Contact local propane/LP gas company
6. Clean pilot (see
Cleaning and Mainte-
nance
, page 26) or replace pilot assembly
7. Replace gas control
1. Press in gas control knob fully
2. After pilot lights, keep gas control knob
pressed in 30 seconds
3. Fully open equipment shutoff valve
4. A) Contact local natural or propane/LP
gas company
B) Clean pilot (see
Cleaning and Main-
tenance
, page 26) or replace pilot as
-
sembly
5. Hand tighten until snug, then tighten 1/4
turn more
6. Replace pilot assembly
7. Replace control valve
ObSERVED PRObLEM
When ignitor button is pressed, there is no
spark at pilot
When ignitor button is pressed, there is spark
at pilot but no ignition
Pilot lights but flame goes out when control
knob is released
