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104781-01D
7
7
For more information, visit www.desatech.com
For more information, visit www.desatech.com
WARNING: Never attempt to service heater while it is connected to
propane supply, operating, or hot. Severe burns can occur.
SYMPTOM
Burner fails to light
Burner lights but goes out when automatic
control valve button is released
Burn rate is low
POSSIBLE CAUSE
1. Propane supply valve closed on propane
tank(s)
2. Excess-flow check valve closed
4. Blockage in burner orifice
5. Piezo ignition system not sparking
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. Main burner valve not fully open
2. Plugged gas orifices
3. Low gas pressure
4. Low fuel supply
REMEDY
1. Open propane supply valve slowly
2. Close propane supply valve on propane
tank and reopen slowly
4. Replace burner orifice
5. Assure ignitor electrode gap is 5.0 mm
(.195 in). Check wire lead for damage
Replace piezo ignitor and/or ignitor elec-
trode as necessary. Do not bend elec-
trode, this may cause breakage
1. Relight, hold automatic control valve
button in 45 seconds
2. Check propane tank(s) for proper gas
supply
3. Tighten connection or replace ther-
mocouple
4. Replace automatic control valve
1. Fully open main burner valve by push-
ing in control knob and turning counter-
clockwise towards HIGH position until
it stops
2. Replace gas orifice
3. Check gas supply; check regulator output
4. Consult propane gas supplier
ACCESSORIES
Purchase accessories and parts from your nearest dealer or service
center. If your dealer or service center can not supply an accessory
or part, call DESA Industries' at 1-905-826-8010. You can also
write to the address listed on the back page of this manual.
DESA Industries
2220 Argentia Road
Unit #4
Mississauga, ON
L5N2K7
905-826-8010
Part Number Description
LPA4020 Fuel Gas Connector
Connects regulator to all standard propane
tanks. U.L. and AGA listed.
LPA3005 Hose/Regulator Assembly
TROUBLESHOOTING
Note:
For additional help, visit DESA
International’s Technical Service web
site at www.desatech.com.
TROUBLESHOOTING
ACCESSORIES