Desa GVC65NA, GVC50NA Trouble Shooting, Continued, Observed, Possible, Problem, Cause, Remedy

TROUBLE-

SHOOTING

Continued

26

OBSERVED	POSSIBLE
PROBLEM	CAUSE		REMEDY
Burner backfiring	1.	Burner orifice is	1.	Clean burner (see
during combustion.		clogged or damaged.		Cleaning and Mainte-
				nance, page 23) or
				replace burner orifice
				(see Changing Burner
				Orifice, page 30).
	2.	Burner damaged.	2.	Replace burner.
	3.	Gas regulator defective.	3.	Replace control valve.
	4.	Delayed ignition.	4.	See above.
Yellow flame during	1.	Not enough air.	1.	Check burner for dirt
burner combustion.				and debris. If found,
				clean burner (see
				Cleaning and Mainte-
				nance, page 23).
	2.	Gas regulator defective.	2.	Replace control valve.
Slight smoke or odor	1. Residues from manu-		1.	Problem will stop after a
during initial opera-		facturing processes.		few hours of operation.
tion.
Burner fails to	1.	Pilot flame not lit.	1.	Light pilot burner (see
respond to thermo-				Lighting Instructions,
stat.				page 18).
	2.	Pilot flame not prop-	2.	Pilot flame needs
		erly heating end of		adjusting. Contact a
		thermocouple.		qualified service person.
	3.	Pilot burner orifice	3.	Clean pilot burner (see
		clogged or damaged.		Cleaning and Mainte-
				nance, page 23).
	4.	Control valve defec-	4.	Replace control valve.
		tive.
	5.	Temperature at ther-
		mostat bulb satisfied.
Heater produces a	1.	Air in gas line.	1.	Operate burner until air
whistling noise when				is removed from line.
burner is lit.				Have gas line checked
				by local natural gas
				company.
	2.	Air passageways on	2.	Observe minimum
		heater blocked.		installation clearances
				(see Figure 3, page 7).
	3.	Dirty or partially	3.	Clean burner (see
		clogged burner orifice.		Cleaning and Mainte-
				nance, page 23) or

replace burner orifice (see Changing Burner Orifice, page 30).

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