Desa Vanguard VN600BA Owner's Operation And Installation Manual page 14

BLUE FLAME NATURAL GAS HEATER
TROUBLESHOOTING
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 operation
Heater produces a whistling noise when
burner is lit
Heater produces a clicking/ticking noise
just after burner is lit or shut off
White powder residue forming within burner
box or on adjacent walls or furniture
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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. Inlet gas pressure is too low
3. Burner damaged
4. Gas regulator defective
1. Not enough air
2. Inlet gas pressure is too low
3. Gas regulator defective
1. Residues from manufacturing processes
1. Turning control knob to HIGH position
when burner is cold
2. Air in gas line
3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice
1. Metal expanding while heating or con-
tracting while cooling
1. When heated, vapors from furniture pol-
ish, wax, carpet cleaners, etc. turn into
white powder residue
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REMEDY
1. Clean burner orifice (see Cleaning and
2. Replace burner orifice
3. Contact local natural gas company
1. Contact local natural gas company
2. Clean burner orifice (see Cleaning and
1. Clean burner orifice (see Cleaning and
2. Contact local natural gas company
3. Replace burner
4. Replace gas regulator
1. Check burner for dirt and debris. If
2. Contact local natural gas company
3. Replace gas regulator
1. Problem will stop after a few hours of
1. Turn control knob to LOW position and
2. Operate burner until air is removed from
3. Observe minimum installation clear-
4. Clean burner (see Cleaning and Mainte-
1. This is common with most heaters. If
1. Turn heater off when using furniture
14
Maintenance, page 12) or replace burner
orifice
Maintenance, page 12) or replace burner
orifice
Maintenance, page 12) or replace burner
orifice
found, clean burner (see Cleaning and
Maintenance, page 12)
operation
let warm up for a minute
line. Have gas checked by local natural
gas company
ances (see Figure 4, page 7)
nance, page 12) or replace burner orifice
noise is excessive, contact qualified ser-
vice person
polish, wax, carpet cleaners, or similar
products
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