Desa 100 - Manual (Page 7)

103386-01G
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For more information, visit www.desatech.com For more information, visit www.desatech.com
TROUBLESHOOTING
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 auto-
matic 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
3. Blockage in burner nozzle
4. 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 re-
placed
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
3. Replace burner nozzle
4. Check to assure ignitor electrode gap is
.130". Check wire lead for damage. Replace
piezo ignitor and/or ignitor electrode as nec-
essary
1. Relight, hold automatic control valve but-
ton in 45 seconds
2. Check propane tank(s) for proper gas supply
3. Tighten connection or replace thermocouple
4. Replace automatic control valve
1. Fully open main burner valve by turning
control knob towards HIGH position until
it stops
2. Replace gas orifice
3. Check gas supply; check regulator output
4. Consult propane gas supplier
TROUBLESHOOTING
Note: For additional help, visit DESA
International’s technical service website at
www.desatech.com.