Desa D20N Owner's Manual page 7

TROUBLESHOOTING
Continued
FAULT CONDITION
Motor starts and runs but heater does not
ignite (ON/OFF switch light remains on)
Heater ignites but ignition control assembly
shuts heater off after a short period of time
(ON/OFF switch light remains on)
ON/OFF switch light does not come on
when switch is turned to the ON(I) position
and heater does not start
ON/OFF switch light comes on when switch
is turned to the ON(I) Position but turns off
after five seconds
105843
POSSIBLE CAUSE
1. No fuel in tank
2. Pump pressure incorrect
3. Dirty fuel filter
4. Obstruction in nozzle assembly
5. Water in fuel tank
6. Bad electrical connection between
ignitor and ignition control assembly
7. Defective ignitor
8. Defective ignition control assembly
1. Pump pressure incorrect
2. Dirty air intake, air output, and/or lint
filter
3. Dirty fuel filter
4. Obstruction in nozzle assembly
5. Photocell assembly not properly
installed (not seeing the flame)
6. Dirty photocell lens
7. Bad electrical connection between
photocell and ignition control assembly
8. Defective photocell
9. Defective ignition control assembly
1. No power to heater
2. Bad electrical connections
3. Electrical short in ignitor
1. Electrical short in motor
7
OWNER'S MANUAL
REMEDY
1. Fill tank with kerosene
2. See Pump Pressure Adjustment, page 10
3. See Fuel Filter, page 8
4. See Nozzle Assembly, page 11
5. Drain and flush fuel tank with clean
kerosene. See Storing, Transporting, or
Shipping, page 6
WARNING: High voltage!
6. Check electrical connections. See Wiring
Diagram, page 21
7. Replace ignitor, see page 9
8. Replace ignition control assembly
1. See Pump Pressure Adjustment, page 10
2. See Air Output, Air Intake, and Lint
Filters, page 10
3. See Fuel Filter, page 8
4. See Nozzle Assembly, page 11
5. Make sure photocell boot is properly
seated in bracket
WARNING: High voltage!
6. Clean photocell lens
7. Check electrical connections. See Wiring
Diagram, page 21
8. Replace photocell
9. Replace ignition control assembly
1. Verify that power cord is plugged into
an electrical outlet and that the circuit
breaker in the electral panel is reset
WARNING: High voltage!
2. Check electrical wiring and connections.
See Wiring Diagram, page 21
3. Check ignitor wiring. If no problems are
found, replace ignitor (see page 9)
1. Check motor wiring. If no problems are
found, replace motor
WARNING: High voltage!