Master Lock B70 Trouble, Shooting, Severe burns and electrical shock can occur, Observed Fault

Continued	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

TROUBLE-				! WARNING
SHOOTING
			Never service heater while it is plugged in, operating, or hot.
			Severe burns and electrical shock can occur.
	OBSERVED FAULT			POSSIBLE CAUSE	REMEDY
	Heater ignites, but			Wrong pump pressure	See Pump Pressure
	flame-out control				Adjustment, page 14.
	shuts off heater after			Dirty air output, air intake,	See Air Output, Air Intake
	a short period of
				and lint filters	and Lint Filters, page 14.
	time.
				Dirty fuel filter	See Fuel Filter, pages 10
					and 11.
				Dirt in nozzle	See Nozzle, pages 15
					through 17.
				Dirty photocell lens	Clean photocell lens.
				Bad flame-out control	Replace flame-out control.
		Heater will not		Wrong pump pressure	See Pump Pressure
		ignite, but motor runs			Adjustment, page 14.
		for a short period of		Carbon deposits on spark	See Spark Plug, pages 12
		time.
				plug and/or improper gap	and 13.
				Dirty fuel filter	See Fuel Filter, pages 10
					and 11.
				Dirt in nozzle	See Nozzle, pages 15
					through 17.
				Water in fuel tank	Drain and flush fuel tank
					with clean kerosene. See
					Storage, page 8.
				! WARNING: High voltage!
				Electronic ignitor not	Ensure electronic ignitor
				grounded (earthed)	mounting is tight.
				Faulty electronic ignitor	Replace electronic
					ignitor.
		Motor does not start		Flame-out control not reset	Reset flame-out control
		when heater is			button, see Figures 6
		plugged in, fan			through 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.
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