Troubleshooting - Desa 50 Owner's Manual

TROUBLE-
SHOOTING
099618
To avoid risk of burn and electrical shock, never attempt to
service heater while it is plugged in, operating, or hot.
OBSERVED FAULT
Heater ignites, but
safety control shuts
off heater after a
short period of time.
Heater will not
ignite, but motor runs
for a short period of
time.
Motor hums when
heater is plugged in,
fan rotates slowly or
does not turn.
Motor does not start;
thermostat (if used)
is set to call for heat.
WARNING
POSSIBLE CAUSE
Incorrect pump pressure
Dirty air output, air
intake and lint filters
Dirty fuel filter
Dirt in nozzle
Dirty photocell lens
Defective safety control
Incorrect 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
Defective electronic
ignitor
Solid state relay not
allowed to reset
Binding pump rotor
Motor thermal trip out
REMEDY
See Pump Pressure
Adjustment, page 13.
See Air Output, Air Intake
and Lint Filters, page 12.
See Fuel Filter, page 13.
See Nozzle, page 15.
Clean photocell lens.
Replace safety control.
See Pump Pressure
Adjustment, page 13.
See Spark Plug, page 14.
See Fuel Filter, page 13.
See Nozzle, page 15.
Drain and flush fuel tank
with clean kerosene. See
Storing, Transporting,
or Shipping, page 10.
Make sure electronic
ignitor mounting is tight.
Replace electronic ignitor.
Wait two minutes before
trying to restart heater.
If fan is hard to turn, see
Pump Rotor, page 16.
Wait for motor to cool
down. It will reset
automatically.
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