106179-01E
7
7
For more information, visit www.desatech.com
For more information, visit www.desatech.com
SYMPTOM
Burner fails to light
Burner lights but goes out when automatic
control valve button is released
Burn rate is low, emitter not glowing
Flames are extremely high coming out of
emitter
POSSIBLE CAUSE
1. (Propane model only) Propane supply
valve closed on propane tank(s)
2. Excess flow check valve closed
3. Blockage in burner orifice
4. Ignition system not sparking
5. Battery not installed (electronic ignition
models only)
1. Not enough warm up time
2. Low gas pressure
3. Thermocouple loose or needs to be
replaced
4. Automatic control valve needs to be
replaced
1. Control valve is on LOW
2. Blockage in burner orifice
3. Low gas pressure
4. Low fuel supply
1. (Natural gas model only) Unit has been
connected to propane gas instead of
natural gas
REMEDY
1. (Propane model only) Open propane
supply valve slowly
2. Close propane supply valve on propane
tank and reopen slowly
3. Replace burner orifice
4. Check to assure ignitor electrode gap is
.15" Check wire lead for damage. Re-
place ignitor and/or ignitor electrode as
necessary
5. Install 9-volt battery in electronic ignitor
1. Relight, hold automatic control valve
button in 45 seconds
2. (Propane model only) Check propane
tank(s) for proper gas supply
(Natural gas model only) Check natural
gas supply
3. Tighten connection or replace thermo-
couple
4. Replace automatic control valve
1. Push and turn valve counter clockwise
to HIGH
2. Replace burner orifice
3. Check gas supply; check regulator
output
4. Consult gas supplier
1. (Natural gas model only) Check gas
source and replace with natural gas
TROUBLESHOOTING
WARNING: Never attempt to service heater while it is connected
to gas supply, operating, or hot. Severe burns can occur.
Note:
For additional help, call DESA Heat-
ing Products’ Technical Service Department
at 1-866-672-6040 or visit our website at
www.desatech.com.
TROUBLESHOOTING
