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111826-01F
For more information, visit www.desatech.com
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TROUBLESHOOTING
Note: All troubleshooting items are listed
in order of operation.
WARNING: Turn off and un-
plug heater and let cool before
servicing. Only a qualifi ed 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 not con nect ed to ig ni tor
ca ble
2. Ignitor cable pinched or wet
3. Piezo ignitor nut is loose
4. Broken ignitor cable
5. Bad piezo ignitor
6. Ig ni tor electrode po si tioned wrong or
broken
1. Gas supply turned off or equipment
shutoff valve closed
2. Control knob not in PI LOT po si tion
3. Control knob not pressed in while in
PI LOT po si tion
4. Air in gas lines when in stalled
5. Depleted gas supply (propane/LP
only)
6. ODS/pilot is clogged
7. Gas regulator setting is not correct
1. Control knob not fully pressed in
2. Control knob not pressed in long
enough
3. Safety interlock system has been
trig gered
4. Equipment shutoff valve not fully open
5. Pilot fl ame not touch ing ther mo cou ple,
which al lows ther mo cou ple to cool,
caus ing pilot fl ame to go out. This prob-
lem could be caused by one or both of
the fol low ing:
A) Low gas pressure
B) Dirty or partially clogged ODS/
pilot
6. Ther mo cou ple con nec tion loose at con-
trol valve
7. Thermocouple dam aged
8. Control valve damaged
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor ca ble dry
3. Tighten nut holding pi ezo ignitor to base
panel of log set. Nut is located behind
base panel.
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace pilot assembly for remote-ready
units; Replace ignitor electrode for vari-
able manually controlled units
1. Turn on gas supply or open equipment
shutoff valve
2. Turn control knob to PI LOT position
3. Press in control knob while in PI LOT
po si tion
4. Continue holding down control knob.
Repeat ig nit ing op er a tion until air is
re moved
5. Contact local propane/LP gas com pany
6. Clean ODS/pilot (see Cleaning and
Main te nance, page 18) or re place
ODS/pilot as sem bly
7. Replace gas regulator
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 sec onds
3. Wait one minute for safety in ter lock sys-
tem to reset. Repeat ignition operation
4. Fully open equipment shutoff valve
5. A) Contact local natural or pro pane/LP
gas company
B) Clean ODS/pilot (see Cleaning and
Main te nance, page 18) or replace ODS/
pilot assembly
6. Hand tighten until snug, then tighten
1/4 turn more
7. Replace pilot assembly
8. Replace control valve
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 ig ni tion
ODS/pilot lights but fl ame goes out when
control knob is released
Note: For additional help, visit
DESA technical service web site at
www.desatech.com.
TROUBLESHOOTING