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8 116170-01A
www.desatech.com
PREVENTATIVE MAINTENANCE SCHEDULE
WARNING: Never service heater while it is plugged in, operating
or hot. Severe burns and electrical shock can occur.
How To
See Storing, Transporting, or
Shipping, page 7
See Air Output, Air Intake, and
Lint Filters, page 10
See Air Output, Air Intake, and
Lint Filters, page 10
See Fuel Filter, page 11
See Fan, page 10
Item
Fuel tank
Air output and lint filters
Air intake filter
Fuel filter
Ignitor
Fan blades
Motor
How Often
Flush every 150-200 hours of operation
or as needed
Replace every 500 hours of operation
or once a year
Wash and dry with soap and water every
500 hours of operation or as needed
Clean twice a heating season or as
needed
No maintenance required
Clean every season or as needed
Not required/permanently lubricated
TROUBLESHOOTING
WARNING: Never service heater while it is plugged in, operating
or hot. Severe burns and electrical shock can occur.
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 be-
tween motor and ignition con
-
trol assembly or ignition control
assembly and power cord
5. Binding pump rotor
6. Defective ignition control as
-
sembly
7. Defective motor
8. Blown fuse or ignitor control
assembly
REMEDY
1. Check circuit breaker in elec-
trical panel
2. Verify the ON/OFF switch is in
ON (|) position and light is on
3. Turn thermostat knob to a
higher setting
4. Check all electrical connec
-
tions. See Wiring Diagrams,
page 25
5. If fan does not turn freely, see
Pump Rotor,
page 14
6 Replace ignition control as
-
sembly
7. Replace motor
8. See Ignition Control Assembly,
page 15
FAULT CONDITION
Motor does not start five seconds
after heater is plugged in
WARNING: High voltage!