Desa VF-18P-PJD - Manual (Page 21)

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TROUBLESHOOTING
Continued
OBSERVED PROBLEM
Burner backfiring during com-
bustion
Orange flame in burner during
burner combustion
Slight smoke or odor during
initial operation (first hour)
Heater produces a whistling noise
when burner is lit
White powder residue forming
within burner box or on adjacent
walls or furniture
Moisture/condensation noticed
on windows
REMEDY
1. Clean burner (see Cleaning
and Maintenance, page 19) or
replace burner orifice
2. Replace damaged burner
3. Replace gas regulator
1. Check burner for dirt and
debris. If found, clean burner
(see Cleaning and Mainte-
nance, page 19)
2. Replace gas control
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 natural
or propane/LP gas company
3. Observe minimum installation
clearances (see page 9)
4. Clean burner (see Cleaning
and Maintenance, page 19) or
replace burner orifice
1. Turn heater off when using
furniture polish, wax, carpet
cleaners or similar products
1. Refer to Air for Combustion
and Ventilation requirements
(page 5)
POSSIBLE CAUSE
1. Burner orifice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
1. Residues from manufacturing
processes and logs curing
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(s)
1. When heated, vapors from
furniture polish, wax, carpet
cleaners, etc. may turn into
white powder residue
1. Not enough combustion/ven-
tilation air