Desa GVC65PA, GVC35PA, GVC50PA TROUBLE- Shooting, Observed Possible Problem Cause Remedy

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 operation.

facturing processes.

few hours of operation.

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 propane 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