Desa CDR3924NT - Manual (Page 22)

www.desatech.com 113183-01D 22
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Residues from manufacturing
processes and logs curing
1. Turning control knob to HI
position when burners are
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
1. Metal expanding while heat-
ing or contracting while
cooling
REMEDY
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 burners until air is
removed from line. Have gas
line checked by local natural
or propane/LP gas company
3. Observe minimum installa-
tion clearances (see pages 8
through 10)
4. Clean burners (see Cleaning
and Maintenance, page 19)
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)
1. This is common with most
heaters. If noise is excessive,
contact qualified service
person
OBSERVED PROBLEM
Slight smoke or odor during initial
operation
Heater produces a whistling noise
when burners are lit
White powder residue forming
within burner box or on adjacent
walls or furniture
Moisture/condensation noticed
on windows
Heater produces a clicking/tick-
ing noise just after burners are lit
or shut off