www.desatech.com
124868-01A
15
OBSERVED PROBLEM POSSIBLE CAUSE
REMEDY
When ignitor button is
pressed, there is no spark
at pilot.
1. Ignitor electrode not con
-
nected 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. 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. Tighten electrode. Replace if
necessary.
When ignitor button is
pressed, there is spark at
pilot but no ignition.
1. Gas supply turned off or
equipment shutoff valve
closed.
2. Gas control knob not in PI
-
LOT position.
3. Gas control knob not pressed
in while in PILOT position.
4. Air in gas lines when in
-
stalled.
5. Depleted gas supply (pro
-
pane/LP models only).
6. Pilot is clogged.
7. Gas regulator setting is not
correct.
1. Turn on gas supply or open
equipment shutoff valve.
2. Turn gas control knob to
PILOT position.
3. Press in gas control knob
while in PILOT position.
4. Continue holding down con
-
trol knob. Repeat igniting op
-
eration until air is removed.
5. Contact local propane/LP gas
company.
6. Clean pilot (see
Cleaning
and Maintenance,
page 13)
or replace pilot assembly.
7. Replace gas regulator.
Burner does not light after
pilot is lit.
1. Burner orifice clogged.
2. Inlet gas pressure is too
low.
3. Thermopile leads discon
-
nected or improperly con-
nected.
4. Thermopile is defective.
1. Clean burner (see
Cleaning
and Maintenance
, page 13)
or replace burner orifice.
2. Contact local propane/LP or
natural gas company.
3. Reconnect leads to TP &
TPTH terminals on control
valve.
4. Replace thermopile.
TROUbLEShOOTING
WARNING: Turn off heater and let cool before servicing. 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.
Note: All troubleshooting items are listed in order of operation.
