www.desatech.com
119171-01E
18
TROUbLESHOOTING
WARNING: Turn off and unplug 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
ODS/pilot. This can damage ODS/pilot unit.
Note:
All troubleshooting items are listed in order of operation.
POSSIBLE CAUSE
1. Ignitor electrode positioned
wrong
. Ignitor electrode broken
. Ignitor electrode not con-
nected to ignitor cable
4. Ignitor cable pinched or
wet
5. Broken ignitor cable
6. Bad ignitor
7. Piezo ignitor nut is loose
1. Gas supply turned off or
equipment shutoff valve
closed
. Control knob is not in pilot
position
. Control knob not fully
pressed in while pressing
ignitor button
4. Air in gas lines when in-
stalled
5. Depleted gas supply (pro-
pane/LP gas)
6. ODS/pilot is clogged
7. Gas regulator setting is not
correct
1. Not enough combustion/
ventilation air
REMEDY
1. Replace pilot assembly
. Replace pilot assembly
. Reconnect ignitor cable
4. Free ignitor cable if pinched
by any metal or tubing.
Keep ignitor cable dry
5. Replace ignitor cable
6. Replace ignitor
7. Tighten nut holding piezo
ignitor. Nut is located inside
heater cabinet at top
1. Turn on gas supply or open
equipment shutoff valve
. Turn control knob to pilot
position
. Turn to PILOT/IGN position.
Fully press in control knob
while pressing ignitor button
4. Continue holding down
control knob. Repeat ignit-
ing operation until air is
removed
5. Contact local propane/LP
gas company
6. Clean ODS/pilot (see
Cleaning and Maintenance
,
page 17) or replace ODS/
pilot assembly
7. Replace gas regulator
1. Refer to
Air for Combustion
and Ventilation
require-
ments (page 5)
OBSERVED PROBLEM
When ignitor button is
pressed in, there is no spark
at ODS/pilot
When ignitor button is
pressed in, there is a spark
at ODS/Pilot but no ignition
Moisture/condensation no-
ticed on windows
