www.desatech.com
17
117001-01E
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Control knob not fully
pressed in
2. Control knob not pressed in
long enough
3. Equipment shutoff valve not
fully open
4. Thermocouple connection
loose at control valve
5. Pilot flame not touching
thermocouple, which al
-
lows thermocouple to cool,
causing 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
6. Thermocouple damaged
7. Control valve damaged
1. Burner orifice is clogged
2. Inlet gas pressure is too
low
1. Manifold pressure is too
low
2. Burner orifice is clogged
1. Burner orifice is clogged or
damaged
2. Burner damaged
3. Gas regulator defective
REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep
control knob pressed in 30
seconds
3. Fully open equipment shut
-
off valve
4. Hand tighten until snug,
then tighten 1/4 turn more
5. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance
,
page 15) or replace ODS/pi
-
lot assembly
6. Replace pilot assembly
7. Replace control valve
1. Clean burner orifice (see
Cleaning and Maintenance
,
page 15) or replace burner
orifice
2. Contact local natural or
propane/LP gas company
1. Contact local natural or
propane/LP gas company
2. Clean burner orifice (see
Cleaning and Maintenance
,
page 15) or replace burner
orifice
1. Clean burner orifice (see
Cleaning and Maintenance
,
page 15) or replace burner
orifice
2. Replace burner
3. Replace gas regulator
OBSERVED PROBLEM
ODS/pilot lights but flame
goes out when control knob
is released
Burner does not light after
ODS/pilot is lit
Delayed ignition of burner
Burner backfiring during
combustion
