Desa 90, 30, 70 owner manual TROUBLE- Shooting, How Often How To

Continued

TROUBLE- SHOOTING

Item	How Often	How To
Spark plug	Clean and regap every 600	See Spark Plug, pages 12 and 13.
	hours operation or replace
	as needed.
Fan blades	Clean every season or as needed. See Fan, page 19.
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 14.

See Air Output, Air Intake

and Lint Filters, page 14.

See Fuel Filter, pages 10 and 11.

See Nozzle, pages 15 thru 17.

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 14.
Carbon deposits on spark	See Spark Plug, pages 12
plug and/or improper gap	and 13.
Dirty fuel filter	See Fuel Filter, pages 10
	and 11.
Dirt in nozzle	See Nozzle, pages 15 thru
Water in fuel tank	17.

Drain and flush fuel tank with clean kerosene. See Storage, page 8.

!WARNING: High voltage!

	Electronic ignitor not	Make sure electronic
	grounded (earthed)
	Bad electronic ignitor	ignitor mounting is tight.
		Replace electronic
		ignitor.
Motor does not start	Flame-out control not reset	Reset flame-out control
when heater is		button, see Figures 6 thru
plugged in, fan		8, pages 7 and 8.
rotates slowly or	Binding pump rotor	If fan is hard to turn, see
does not turn.
		Pump Rotor, page 18.
			9

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