Troubleshooting - Desa Comfort Glow CGB3930NRA Owner's Operation And Installation Manual

OWNER'S MANUAL
TROUBLESHOOTING
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.
,_ WARNING: Turn off heater
and let cool before servicing. Only
a qualified service person should
service and repair heater.
_i, CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot. This can damage ODS/
pilot unit.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
When ignitor button is pressed, there is no
spark at ODS/pilot
l,
2.
3.
Ignitor electrode not connected to igni-
tor cable
Ignitor cable pinched or wet
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 to base
panel of log set. Nut is located behind
base panel
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace piezo ignitor
7. Replace piezo ignitor
When ignitor button is pressed, there is
spark at ODS/pilot but no ignition
1. Gas supply turned off or manual 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
1. Turn on gas supply or open manual
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, page 18) or replace ODS/
pilot assembly
6. Replace gas control
ODS/pilot lights but flame goes out when
control knob is released
1. Control knob not fully pressed in
2. Control knob not pressed in long enough
3. Manual shutoff valve not fully open
4. Pilot flame not touching thermocouple,
which allows thermocouple to cool,
causing pilot flame to go out. This prob-
lem 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. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Fully open manual shutoff valve
4. A) Contact local natural gas company
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 18) or replace ODS/
pilot assembly
5. Hand tighten until snug, then tighten 1/4
turn more
6. Replace thermocouple
7. Replace control valve
105677
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19
Continued