www.desatech.com
121486-01F
25
POSSIBLE CAUSE
1. Control knob not fully
pressed in
2. Control knob not pressed
in long enough
3. Safety interlock system
has been triggered
4. Equipment shutoff valve
not fully open
5. 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
6. Thermocouple connection
loose at control valve
7. Thermocouple damaged
8. Control valve damaged
1. Inlet gas pressure is too
low
2. Burner orifice(s) clogged
3. Thermopile leads discon-
nected or improperly con-
nected
4. Burners will not come on
in remote position
1. Manifold pressure is too
low
2. Burner orifice(s) clogged
1. Burner orifice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep
control knob pressed in 30
seconds
3. Wait one minute for safety
interlock system to reset.
Repeat ignition operation
4. Fully open equipment shut-
off valve
5. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning and Mainte-
nance
, page 22) or replace
ODS/pilot assembly
6. Hand tighten until snug,
then tighten 1/4 turn more
7. Replace pilot assembly
8. Replace control valve
1. Contact local natural or
propane/LP gas company
2. Clean burner(s) (see
Cleaning and Mainte-
nance
, page 22) or replace
burner orifice
3. Reconnect leads (see
Wir-
ing Diagram
, page 28)
4. Replace battery in hand-
held remote and receiver
1. Contact local natural or
propane/LP gas company
2. Clean burner(s) (see
Cleaning and Mainte-
nance
, page 22) or replace
burner orifice(s)
1. Clean burner (see
Clean-
ing and Maintenance
,
page 22) or replace burner
orifice
2. Replace damaged 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 one or
both burners
Burner backfiring during
combustion
TROUBLESHOOTING
Continued
