Desa Tech HEATERS OWNER'S MANUAL Troubleshooting, Continued, Observed Problem, Possible Cause

TROUBLESHOOTING

Continued

OBSERVED PROBLEM	POSSIBLE CAUSE		REMEDY
Heater ignites, but flame-out	1. Wrong pump pressure		1.	Adjust pump pressure (see
control shuts off heater after a				Pump Pressure Adjustment
short period of time				sections, page 12)
	2.	Dirty fuel filters	2.	Clean fuel filters (see Fuel
				Filters, page 14)
	3.	Dirt in nozzle	3.	Replace nozzle (see Nozzle,
	4.	Dirty photocell lens		page 11)
			4.	Clean photocell lens with
	5.	Open or damaged photocell		clean cotton swab
			5.	Replace photocell
	6.	Bad flame-out control	6.	Replace flame-out control
	7.	Damaged fan switch	7.	Replace fan switch
Heater burns, but puffs of smoke	1. Wrong pump pressure		1.	Adjust pump pressure (see
can be seen				Pump Pressure Adjustment
Heater does not burn steady	2. A) Heater almost out of fuel			sections, page 12)
Heater burns with odor			2.	A) Add fuel to tank
Heater smokes continuously		B) Water condensation in fuel		B) Check fuel tank for bubbles
		tank		of water in bottom. If found,
		C) Wrong fuel		remove fuel (see Storing,
				Transporting or Shipping,
				page 6). Clean tank and fuel
				filters (see Fuel Filters, page
				14). Fill with clean fuel
				C) Remove wrong fuel (see
				Storing, Transporting or Ship-
				ping, page 6). Clean tank and
				fuel filters (see Fuel Filters,
				page 14. Fill with correct fuel
	3.	Dirty fuel filters	3.	Clean fuel filters (see Fuel
	4.	Air leak in suction system		Filters, page 14)
			4.	Tighten all fuel line connections
	5.	Dirty nozzle		(see Fuel Lines, page 13)
			5.	Replace nozzle (see Nozzle,
	6.	Low voltage causing motor to		page 11)
			6.	Check voltage at heater. Volt-
		operate below rated speed		age at heater should be not
				less than 90% of rated voltage
				(108V minimum for 120V
	7.	Loose fuel line		heaters)
			7.	Check and tighten all fuel line
				connections (see Fuel Lines,
				page 13)

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