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104129
PROPANE CONSTRUCTION HEATER
TC100R
SYMPTOM
Pilot fails to light.
Pilot lights but goes
out when automatic control
valve button is released.
Burn rate is low; emitter not
glowing.
Soot forming inside heater,
flame 100% yellow.
POSSIBLE CAUSE
1. Propane supply valve closed on propane
tank(s).
2. Excess-flow check valve closed.
3. Air in gas line.
4. Blockage in pilot 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.
1. Main burner valve not fully open.
2. Low fuel supply.
REMEDY
1. Open propane supply valve slowly.
2. Close propane supply valve on propane tank and
reopen slowly.
3. Allow several minutes to purge air with automatic
control valve button depressed.
4. Replace pilot orifice.
5. Adjust ignitor electrode gap to .120". Check wire
lead for damage. Replace piezo ignitor and/or
ignitor electrode as necessary.
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. Fully open main burner valve by turning the valve
handle towards ON position until it stops.
2. Replace gas orifice.
3. Check gas supply; check regulator output.
4. Consult propane gas supplier.
1. Adjust main burner valve slowly towards ON
position.
2. Consult propane gas supplier.
TROUBLESHOOTING
You may have further questions about this
heater. If so, contact DESA International’s Tech-
nical Service Department at 1-800-323-5190.
WARNING: Never attempt to service heater while it is connected
to propane supply, operating, or hot. Severe burns can occur.