Troubleshooting - Desa 125,000 Btu/Hr Owner's Manual

TROUBLESHOOTING

8
TROUBLESHOOTING
WARNING: Never service heater while it is plugged
in, operating, or hot. Severe burns and electrical
shock can occur.
FAULT CONDITION
Motor does not start five seconds after
heater is plugged in
Motor starts and runs but heater does not
ignite
Heater ignites but ignition control assem-
bly shuts heater off after a short period of
time
POSSIBLE CAUSE
1. No power to heater
2. ON/OFF switch not in the ON (|) position
3. Thermostat setting is too low
4. Bad electrical connection between motor
and ignition control assembly or ignition
control assembly and power cord
5. Binding pump rotor
6. Blown fuse (F1, GMA 10A) on ignition
control assembly
7. Defective ignition control assembly
8. Defective motor
1. No fuel in tank
2. Pump pressure incorrect
3. Dirty fuel filter
4. Obstruction in nozzle
5. Water in fuel tank
6. Bad electrical connection between igni-
tor and ignition control assembly
7. Defective ignitor
8. Blown fuse (F2) on ignition control as-
sembly
9. Defective ignition control assembly
10. 200VT Model Only: Defective fuel valve
1. Pump pressure incorrect
2. Dirty air intake, air output, and/or lint fil-
ter
3. Dirty fuel filter
4. Obstruction in nozzle
5. Photocell assembly not properly installed
(not seeing the flame)
6. Dirty photocell lens
7. Bad electrical connection between pho-
tocell and ignition control assembly
8. Defective photocell
9. Defective ignition control assembly
For more information, visit www.desatech.com
For more information, visit www.desatech.com
REMEDY
1. Check circuit breaker in electrical panel
2. Verify the ON/OFF switch is in ON (|)
position and light is on
3. Turn thermostat knob to a higher setting
WARNING: High voltage!
4. Check all electrical connections. See Wir-
ing Diagrams, page 17
5. If fan does not turn freely, see Pump Rotor,
page 15
6. See Ignition Control Assembly, page 16
7. Replace ignition control assembly
8. Replace motor
1. Fill tank with kerosene
2. See Pump Pressure Adjustment, page 10
3. See Fuel Filter, pages 10 and 11
4. See Nozzle Assembly, pages 13 and 14
5. Drain and flush fuel tank with clean kero-
sene. See Storing, Transporting, or Ship-
ping, page 7
WARNING: High voltage!
6. Check electrical connections. See Wiring
Diagrams, page 17
7. Replace ignitor, see page 12
8. See Ignition Control Assembly, page 16
9. Replace ignition control assembly
10. See Fuel Valve, page 11
1. See Pump Pressure Adjustment, page 10
2. See Air Output, Air Intake, and Lint Filters,
page 9
3. See Fuel Filter, pages 10 and 11
4. See Nozzle Assembly, pages 13 and 14
5. Make sure photocell boot is properly
seated in bracket
6. Clean photocell lens
WARNING: High voltage!
7. Check electrical connections. See Wiring
Diagrams, page 17
8. Replace photocell
9. Replace ignition control assembly
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