Troubleshooting - Desa PORTABLE FORCED AIR HEATERS Owner's Manual

PREVENTATIVE
MAINTENANCE
SCHEDULE
Continued
TROUBLE-
SHOOTING
102437
Fuel filter Clean twice a heating season
or replace as needed.
Spark plug Clean and regap every 600
hours operation or replace
as needed.
Fan blades Clean each season or as needed. See Fan, page 9.
Motor Not required/permanently lubricated
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
OBSERVED FAULT
Heater ignites, but
flame-out control
shuts off heater after
a short period of
time.
Heater will not
ignite, but motor runs
for a short period of
time.
!
Motor does not start
when heater is plugged
in, fan rotates slowly
or does not turn.
!
WARNING
POSSIBLE CAUSE
Wrong pump pressure
Dirty air output, air intake
and lint filters
Dirty fuel filter
Dirt in nozzle
Dirty photocell lens
Bad flame-out control
Wrong pump pressure
Carbon deposits on spark
plug and/or improper gap
Dirty fuel filter
Dirt in nozzle
Water in fuel tank
WARNING: High voltage!
Electronic ignitor not
grounded
Bad electronic ignitor
Flame-out control not reset
Binding pump rotor
See Fuel Filter, page 10.
See Spark Plug, pages 10
and 11.
REMEDY
See Pump Pressure
Adjustment, page 10.
See Air Output, Air Intake
and Lint Filters, page 9.
See Fuel Filter, page 10.
See Nozzle, page 11.
Clean photocell lens.
Replace flame-out control.
See Pump Pressure
Adjustment, page 10.
See Spark Plug, pages 10
and 11.
See Fuel Filter, page 10.
See Nozzle, page 11.
Drain and flush fuel
tank with clean kerosene.
See Storing, Transporting,
or Shipping, page 7.
Make sure electronic ig-
nitor mounting is tight.
Replace electronic ignitor.
Press flame-out control
reset button.
If fan is hard to turn, see
Pump Rotor, page 12.
7