www.desatech.com
113048-01F
20
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
Yellow flame during burner
combustion
Slight smoke or odor during initial
operation
Heater produces a whistling noise
when burner is lit
White powder residue forming
within burner box or on adjacent
walls or furniture
Burner plaque(s) does not glow
POSSIBLE CAUSE
1. Not enough air
2. Gas regulator defective
3. Clogged or dirty burner
1. Residues from manufactur-
ing processes
1. Turning control knob to the
highest position when burner
is cold
2. Air in gas line
3. Air passageways on heater
blocked
4. Dirty or partially clogged
burner orifice
1. When heated, vapors from
furniture polish, wax, carpet
cleaners, etc. may turn into
white powder residue
1. Plaque damaged
2. Inlet gas pressure is too low
3. Control knob set between
locked positions
REMEDY
1. Check burner for dirt and
debris. If found, clean burner
(see
Cleaning and Mainte-
nance
, page 17)
2. Replace gas regulator
3. Clean burner (see
Cleaning
and Maintenance
, page 17)
1. Problem will stop after a few
hours of operation
1. Turn control knob to the low-
est 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 Figure 4, page 8)
4. Clean burner (see
Cleaning
and Maintenance
, page 17)
or replace burner orifice
1. Turn heater off when using
furniture polish, wax, carpet
cleaners or similar products
1. Replace burner
2. Contact local natural or pro-
pane/LP gas company
3. Turn control knob until it
locks at desired setting
