Trouble- shooting – Desa A User Manual

Page 30

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30

101048

TROUBLE-

SHOOTING

Continued

OBSERVED
PROBLEM

Burner does not light
after ODS/pilot is lit

Delayed ignition of
burner

Burner backfiring
during combustion

Yellow flame during
burner combustion

Slight smoke or odor
during initial opera-
tion

Heater produces a
whistling noise when
burner is lit

POSSIBLE
CAUSE

1. Burner orifice is

clogged

2. Burner orifice diameter

is too small

3. Inlet gas pressure is

too low

1. Manifold pressure is

too low

2. Burner orifice is

clogged

1. Burner orifice is

clogged or damaged

2. Burner damaged
3. Gas regulator defective

1. Not enough air

2. Gas regulator defective

1. Residues from manu-

facturing processes

1. Turning control knob

to HI position when
burner is cold

2. Air in gas line

3. Air passageways on

heater blocked

4. Dirty or partially

clogged burner orifice

REMEDY

1. Clean burner (see

Cleaning and Mainte-
nance
, page 28) or
replace burner orifice

2. Replace burner orifice

3. Contact local propane

gas company

1. Contact local propane

gas company

2. Clean burner (see

Cleaning and Mainte-
nance
, page 28) or
replace burner orifice

1. Clean burner (see

Cleaning and Mainte-
nance
, page 28) or
replace burner orifice

2. Replace burner
3. Replace gas regulator

1. Check burner for dirt

and debris. If found,
clean burner (see
Cleaning and Mainte-
nance
, page 28)

2. Replace gas regulator

1. Problem will stop after a

few hours of operation

1. Turn control knob to LO

position and let warm up
for a minute

2. Operate burner until air

is removed from line.
Have gas line checked
by local propane gas
company

3. Observe minimum

installation clearances
(see Figure 10, page 13)

4. Clean burner (see

Cleaning and Mainte-
nance
, page 28) or
replace burner orifice

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