Desa PORTABLE FORCED AIR HEATERS Trouble Shooting, See Fuel Filter, page, Observed Fault, Remedy

PREVENTATIVE MAINTENANCE SCHEDULE

Continued

TROUBLE-

SHOOTING

Fuel filter	Clean twice a heating season	See Fuel Filter, page 10.
	or replace as needed.
Spark plug	Clean and regap every 600	See Spark Plug, pages 10
	hours operation or replace	and 11.
	as needed.
Fan blades	Clean each season or as needed.	See Fan, page 9.
Motor	Not required/permanently lubricated

!WARNING

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.

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

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.

Heater will not ignite, but motor runs for a short period of time.

Wrong pump pressure	See Pump Pressure
	Adjustment, page 10.
Carbon deposits on spark	See Spark Plug, pages 10
plug and/or improper gap	and 11.
Dirty fuel filter	See Fuel Filter, page 10.
Dirt in nozzle	See Nozzle, page 11.
Water in fuel tank	Drain and flush fuel
	tank with clean kerosene.
	See Storing, Transporting,
	or Shipping, page 7.

!WARNING: High voltage!

	Electronic ignitor not	Make sure electronic ig-
	grounded	nitor mounting is tight.
	Bad electronic ignitor	Replace electronic ignitor.
Motor does not start	Flame-out control not reset	Press flame-out control
when heater is plugged		reset button.
in, fan rotates slowly	Binding pump rotor	If fan is hard to turn, see
or does not turn.
		Pump Rotor, page 12.
			7

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