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

TROUBLESHOOTING

WARNING: Never service heater while it is plugged in, operating or hot. Severe burns and electrical shock can occur. Only a qualified service person should service and repair heater.

OBSERVED PROBLEM	POSSIBLE CAUSE		REMEDY
Motor does not start when heater	1. No power or low voltage at		1.	A) Check condition of power
is plugged in and thermostat set-		heater due to:		cord or extension cord. Repair
ting is higher than surrounding		A) Damaged power cord or		or replace if damaged
air temperature		extension cord		B) Use extension cord with
		B) Wrong size extension cord		proper wire size (see To Start
		C) Heater plugged into outlet		Heater, page 5 )
		with voltage lower than 120		C) Make sure heater is plugged
		volt		into 120 volt/60 hertz outlet
	2.	Loose electrical connections	2.	Check connections. Tighten if
	3.	Motor overload protector		loose
			3.	A) See Fan Blades and Air
		tripped due to:		Deflectors, page 11
		A) Dirty fan		B) Remove debris from fan
		B) Debris pulled into fan area		and fan guard area
		by fan		C) Turn fan by hand. If fan is
		C) Binding pump		hard to turn, see Pump, page 13
		D) Low voltage		D) See steps B and C under
				item 1 above
				Note: Be sure to reset motor
				overload protector by pressing
				reset button on top of motor
	4.	Flame-out control not reset	4.	Press and release flame-out
				control reset button. See
				Figure 4, page 5 for button
				location
	5.	Damaged flame-out control	5.	Replace flame-out control
	6.	Damaged power relay	6.	Replace power relay
	7.	Damaged thermostat	7.	Replace thermostat
	8.	Binding pump	8.	Turn fan by hand. If fan is hard
				to turn, see Pump, page 13

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