Desa FAS-3B - Manual (Page 15)

15 105566
OWNER’S MANUAL
TROUBLESHOOTING
Note: All troubleshooting items are listed
in order of operation.
OBSERVED PROBLEM
When ignitor button is pressed in, there is no
spark at ODS/pilot
ODS/pilot lights but flame goes out when
control knob is released
When ignitor button is pressed in, there is a
spark at ODS/pilot but no ignition
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
1. Gas supply turned off or manual shutoff
valve closed
2. Control knob not fully pressed in while
pressing ignitor button
3. Air in gas lines when installed
4. ODS/pilot is clogged
5. Gas regulator setting is not correct
6. Control knob not in pilot position
1. Control knob not fully pressed in
2. Control knob not pressed in long enough
3. Manual shutoff valve not fully open
4. Thermocouple connection loose at con-
trol valve
5. 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
6. Thermocouple damaged
7. Control valve damaged
REMEDY
1. Replace ignitor
2. Replace ignitor
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 control valve (piezo is part of
control valve)
1. Turn on gas supply or open manual
shutoff valve
2. Fully press in control knob while press-
ing ignitor button
3. Continue holding down control knob. Re-
peat igniting operation until air is removed
4. Clean ODS/pilot (see Cleaning and
Maintenance, page 14 ) or replace ODS/
pilot assembly
5. Replace gas regulator
6. Turn control knob to pilot position
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Fully open manual shut-off valve
4. Hand tighten until snug, then tighten
1/4 turn more
5. A) Contact local natural gas company
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 14) or replace ODS/
pilot assembly
6. Replace thermocouple
7. Replace control valve
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.
Note: For additional help, visit DESA
International’s Technical Service web
site at
www.desatech.com .
www.desatech.com
Continued