Master Lock 150000 BTU/Hr, 70000 BTU/Hr TROUBLE- Shooting, Observed Fault Possible Cause

TROUBLE- SHOOTING

WARNING

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 flame-out control shuts off heater after a short period of time

Wrong pump pressure	See Pump Pressure
	Adjustment, page 12.
Dirty air output, air intake,	See Air Output, Air Intake
and lint filters	and Lint Filters, page 12.
Dirty fuel filter	See Fuel Filter, pages 10
	and 11.
Dirt in nozzle	See Nozzle, page 13.
Dirty photocell lens	Clean photocell lens.
Bad flame-out control	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 12.
Carbon deposits on spark	See Spark Plug, page 11.
plug and/or improper gap
Dirty fuel filter	See Fuel Filter, pages 10
	and 11.
Dirt in nozzle	See Nozzle, page 13.
Water in fuel tank	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 and
plugged in, fan		7, page 7.
rotates slowly or	Binding pump rotor	If fan is hard to turn, see
does not turn.
		Pump Rotor, page 14.

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