Desa VUL18 - Manual (Page 30)

www.desatech.com 119426-01A 30
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. Battery is not installed. Bat-
tery power is low
1. Metal expanding while heating
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 9
through 11)
4. Clean burners (see Cleaning
and Maintenance, page 26)
or replace burner orifice(s)
1. Turn heater off when using
furniture polish, wax, carpet
cleaners or similar products
1. Refer to Air for Combustion
and Ventilation requirements
(page 6)
1. Replace 9-volt batteries in re-
ceiver and hand-held remote
1. This is normal with most heat-
ers. 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
Remote does not function (Re-
mote-Ready Models Only)
Heater produces a clicking/tick-
ing noise just after burners are
lit or shut off
TROUbLESHOOTING
Continued