Desa BTU/HR - Manual (Page 7)

www.desatech.com 113282-01C 7
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 6
See Air Output, Air Intake, and
Lint Filters, page 9
See Air Output, Air Intake, and
Lint Filters, page 9
See Fuel Filter, page 10
See Fan, page 9
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. If equipped, thermostat setting
is too low
4. Bad electrical connection be-
tween motor and ignition con-
trol assembly or ignition con-
trol 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 16
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 Assem-
bly, page 15
FAULT CONDITION
Motor does not start five sec-
onds after heater is plugged in
WARNING: High voltage!