107885-01D
For more information, visit www.desatech.com
For more information, visit www.desatech.com
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19
TROUBLESHOOTING
TROUBLESHOOTING
WARNING: Turn off and un-
plug heater and let cool before
servicing. Only a qualified ser-
vice 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.
POSSIBLE CAUSE
1. Ignitor electrode positioned wrong
2. Ignitor electrode broken
3. Ignitor electrode not connected to igni-
tor cable
4. Ignitor cable pinched or wet
5. Broken ignitor cable
6. Bad piezo ignitor
7. Piezo ignitor nut is loose
1. Gas supply turned off or equipment
shutoff valve closed
2. Control knob not fully pressed in while
pressing ignitor button (non-thermostat
models only)
Thermostat control knob not fully
pressed in while pressing ignitor button
(thermostat models only)
3. Air in gas lines when installed
4. Depleted gas supply (propane/LP gas)
5. ODS/pilot is clogged
6. Gas regulator setting is not correct
7. Thermostat control knob is not in pilot
position (thermostat models only)
REMEDY
1. Replace pilot assembly
2. Replace pilot assembly
3. Reconnect ignitor cable
4. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
5. Replace ignitor cable
6. Replace piezo
7. Tighten nut holding piezo ignitor. Nut
is located inside heater cabinet at top
1. Turn on gas supply or open equipment
shutoff valve
2. Turn to PILOT/IGN position. Fully press
in control knob while pressing ignitor
button (non-thermostat models only)
Fully press in thermostat control knob
while pressing ignitor button (thermo-
stat models only)
3. Continue holding down control knob. Re-
peat igniting operation until air is removed
4. Contact local propane/LP gas company
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 17) or replace ODS/
pilot assembly
6. Replace gas regulator
7. Turn thermostat control knob to pilot
position
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
Note:
For additional help, visit DESA
International’s technical service web site
at
www.desatech.com
.
Note:
All troubleshooting items are listed in
order of operation.
