Troubleshooting, Observed Problem Possible Cause Remedy

TROUBLESHOOTING

Note: For additional help, visit DESA International’s technical service web site at www.desatech.com.

Note: All troubleshooting items are listed in order of operation.

WARNING: Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater.

CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/ pilot unit.

OBSERVED PROBLEM	POSSIBLE CAUSE		REMEDY
When ignitor button is pressed, there is no	1.	Ignitor electrode positioned wrong	1.	Replace pilot assembly
spark at ODS/pilot	2.	Ignitor electrode broken	2.	Replace pilot assembly
	3.	Ignitor electrode not connected to igni-	3.	Reconnect ignitor cable
		tor cable
	4.	Ignitor cable pinched or wet	4.	Free ignitor cable if pinched by any
				metal or tubing. Keep ignitor cable dry
	5.	Piezo ignitor nut is loose	5.	Tighten nut holding piezo ignitor to
				heater cabinet. Nut is located inside
				heater cabinet at top
	6.	Broken ignitor cable	6.	Replace ignitor cable
	7.	Bad piezo ignitor	7.	Replace piezo ignitor

When ignitor button is pressed, there is	1.	Gas supply turned off or equipment	1.	Turn on gas supply or open equipment
spark at ODS/pilot but no ignition		shutoff valve closed		shutoff valve
	2.	Control knob not in PILOT position	2.	Turn control knob to PILOT position
	3.	Control knob not pressed in while in	3.	Press in control knob while in PILOT
		PILOT position		position
	4.	Air in gas lines when installed	4.	Continue holding down control knob.
				Repeat igniting operation until air is re-
				moved
	5.	Depleted gas supply (propane/LP only)	5.	Contact local propane/LP gas company
	6.	ODS/pilot is clogged	6.	Clean ODS/pilot (see Cleaning and
				Maintenance, page 16) or replace ODS/
				pilot assembly
	7.	Gas regulator setting is not correct	7.	Replace gas regulator

ODS/pilot lights but flame goes out when	1.	Control knob not fully pressed in	1.	Press in control knob fully
control knob is released	2.	Control knob not pressed in long enough	2.	After ODS/pilot lights, keep control
				knob pressed in 30 seconds
	3.	Equipment shutoff valve not fully open	3.	Fully open equipment shutoff valve
	4.	Thermocouple connection loose at con-	4.	Hand tighten until snug, then tighten 1/4
		trol valve		turn more
	5.	Pilot flame not touching thermocouple,	5.	A) Contact local natural or propane/LP
		which allows thermocouple to cool,		gas company
		causing pilot flame to go out. This prob-		B) Clean ODS/pilot (see Cleaning and
		lem could be caused by one or both of		Maintenance, page 16) or replace ODS/
		the following:		pilot assembly
		A) Low gas pressure
		B) Dirty or partially clogged ODS/pilot
	6.	Thermocouple damaged	6.	Replace pilot assembly
	7.	Control valve damaged	7.	Replace control valve

For more information, visit www.desatech.com

107902-01D

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Desa GWN6, GWRN10, GWRP10, GWP10T, GWN10 Troubleshooting, Observed Problem Possible Cause Remedy

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TROUBLESHOOTING

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

GWN10T, GWP10T, GWRN10, GWN6, GWP6 specifications