111162-01B
18
For more information, visit www.desatech.com
For more information, visit www.desatech.com
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
ODS/pilot. This can damage ODS/
pilot unit.
POSSIBLE CAUSE
1. Ignitor electrode not connected to ig-
nitor cable
2. Ignitor cable pinched or wet
3. Broken ignitor cable
4. Bad piezo ignitor
5. Ignitor electrode broken
6. Ignitor electrode positioned wrong
1. Gas supply turned off or equipment
shutoff valve closed
2. Control knob not in PILOT position
3. Control knob not pressed in while in
PILOT position
4. Air in gas lines when installed
5. ODS/pilot is clogged
6. Gas regulator setting is not correct
7. Depleted gas supply (propane/LP only)
1. Control knob not fully pressed in
2. 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, caus-
ing pilot flame to go out. This problem could
be caused by one or both of the following:
A) Low gas pressure
B) Dirty or partially clogged ODS/pilot
5. Thermocouple connection loose at con-
trol valve
6. Thermocouple damaged
7. Control valve damaged
1. Burner orifice clogged
2. Inlet gas pressure is too low
3. Burner orifice diameter is too small
4. Thermopile leads disconnected or im-
properly connected
5. Burners will not come on in remote position
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
3. Replace ignitor cable
4. Replace piezo ignitor
5. Replace pilot assembly
6. Replace pilot assembly
1. Turn on gas supply or open equipment
shutoff valve
2. Turn control knob to PILOT position
3. Press in control knob while in PILOT
position
4. Continue holding down control knob. Re-
peat igniting operation until air is removed
5. Clean ODS/pilot (see Cleaning and
Maintenance, pages 16 and 17) or re-
place ODS/pilot assembly
6. Replace gas control
7. Contact local propane/LP gas company
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Fully open equipment shutoff valve
4. A) Contact local propane/LP or natural
gas company
B) Clean ODS/pilot (see Cleaning and
Maintenance, pages 16 and 17) or re-
place ODS/pilot assembly
5. Hand tighten until snug, then tighten
1/4 turn more
6. Replace pilot assembly
7. Replace control valve
1. Clean burner (see Cleaning and Main-
tenance, pages 16 and 17) or replace
burner orifice
2. Contact local propane/LP or natural gas
company
3. Replace burner orifice
4. Reconnect leads (see Wiring Diagram,
page 21)
5. Replace battery in transmitter and hand-
held remote
OBSERVED PROBLEM
When ignitor button is pressed, there is no
spark at ODS/pilot
When ignitor button is pressed, there is
spark at ODS/pilot but no ignition
ODS/pilot lights but flame goes out when
control knob is released
Burner does not light after ODS/pilot is lit
Note:
For additional help, visit DESA
Heating Products’ technical service web
site at
www.desatech.com
.
Note:
All troubleshooting items are listed in
order of operation.
TROUBLESHOOTING
