Desa SB350D Owner's Manual page 8

HIGH PRESSURE PORTABLE FORCED AIR
HEATER 350,000 AND 600,000 BTU/HR
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
Heater will not ignite, but motor runs for a
short period of time.
POSSIBLE CAUSE
1. A) Fuel tank empty
B) Water in fuel
C) Wrong fuel
2. Dirt in nozzle
3. Very low temperature may cause fuel to
thicken and not flow
4. Dirty fuel filters
5. Wrong pump pressure
6. Spark plug wire disconnected from plug
7. Spark plug problems due to:
A) Wrong gap
B) Plug wet with fuel
C) Carbon deposits on plug
D) Damaged plug
8. Solenoid valve not opening
9. Damaged electronic ignitor
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REMEDY
1. A) Add fuel to tank
B) Check fuel tank for bubbles of water
in bottom. If found, remove fuel (see
Storing, Transporting, or Shipping, page
5). Clean tank and fuel filters (see Fuel
Filters, page 12). Fill with clean fuel
C) Remove wrong fuel (see Storing,
Transporting, or Shipping, page 5).
Clean tank and fuel filters (see Fuel Fil-
ters, page 12). Fill with correct fuel
2. Replace nozzle (see Nozzle, page 10)
3. Move heater to warmer place until fuel
flows freely
4. Clean fuel filters (see Fuel Filters, page 12)
5. Adjust pump pressure (see Pump Pres-
sure Adjustment, page 11)
6. Connect spark plug wire to spark plug
7. A) Adjust electrode gap to .075" (see
Spark Plug, page 10)
B) Clean fuel from spark plug with
clean, soft cloth
C) Replace plug if heavily coated with
carbon (see Spark Plug, page 10)
D) Inspect plug for worn or eroded elec-
trodes. If found, replace plug (see Spark
Plug, page 10)
8. Check electrical connections and volt-
age to solenoid. If good, replace sole-
noid valve
WARNING: High Voltage!
9. Replace electronic ignitor
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