Troubleshooting - Desa 80-CC Owner's Manual

WARNING: Never service heater while it is plugged in, connected
to propane supply, operating or hot. Severe burns and electrical
shock can occur.
OBSERVED FAULT
Burner fails to light
Pilot lights but goes out when
automatic control valve button
is released (200,000 Btu models
only)
Burn rate is low
8

tROuBLESHOOtINg

POSSIBLE CAUSE
1. Propane supply valve closed
on propane tank(s)
2. Excess flow check valve
closed
3. Blockage in burner orifice
4. Piezo ignition system not
sparking
5. Pilot orifice clogged
(200,000 Btu 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. Plugged gas orifice
3. Low gas pressure
4. Low fuel supply
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REMEDy
1. 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 elec-
trode gap is .195" Check wire
lead for damage. Replace
piezo ignitor and/or ignitor
electrode as necessary
5. Clean or replace pilot assembly
1. Relight, hold automatic control
valve button in 45 seconds
2. Check propane tank(s) for
proper gas supply
3. Tighten connection or replace
thermocouple
4. Replace automatic control
valve
1. Turn valve counter clockwise
to HIGH
2. Replace gas orifice
3. Check gas supply; check
regulator output
4. Consult propane gas supplier
116557-01C