Troubleshooting - Desa RH125TH Owner's Manual

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
112865-01A
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 (GMA 10A) on ignition con-
trol 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. 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
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.co
TROUBLESHOOTING
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 Diagram, page 16
5. If fan does not turn freely, see Pump Rotor,
page 12
6. See Ignition Control Assembly, page 12
7. Replace ignition control assembly
8. Replace motor
1. Fill tank with kerosene
2. See Pump Pressure Adjustment, page 9
3. See Fuel Filter, page 9
4. See Nozzle Assembly, page 11
5. Drain and flush fuel tank with clean kero-
sene. See Storing, Transporting, or Ship-
ping, page 5
WARNING: High voltage!
6. Check electrical connections. See Wiring
Diagram, page 16
7. Replace ignitor, see page 10
8. Replace ignition control assembly
1. See Pump Pressure Adjustment, page 9
2. See Air Output, Air Intake, and Lint Filters,
page 8
3. See Fuel Filter, page 9
4. See Nozzle Assembly, page 11
5. Make sure photocell boot is properly
seated in bracket
6. Clean photocell lens
WARNING: High voltage!
7. Check electrical connections. See Wiring
Diagram, page 16
8. Replace photocell
9. Replace ignition control assembly
7