Desa WMN10 - Manual (Page 20)

www.desatech.com 123995-01C 20
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
Heater shuts off in use (ODS
operates)
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 adja-
cent walls or furniture
Moisture/condensation no-
ticed on windows
REMEDY
1. Open window and/or door
for ventilation
2. Contact local natural or
propane/LP gas company
3. Clean ODS/pilot (see Clean-
ing, page 17)
1. Problem will stop after a few
hours of operation
1. Turn control knob to LOW
or position 1 and let warm
up for a minute
2. Operate burner until air is
removed from line. Have gas
checked by local natural or
propane/LP gas company
3. Observe minimum installa-
tion clearances (see Figure
4, page 8)
4. Clean burner (see Cleaning,
page 17) or replace burner
orifice
1. This is normal with most
heaters. If noise is exces-
sive, contact qualified ser-
vice person
1. Turn heater off when us-
ing furniture polish, wax,
carpet cleaners or similar
products
1. Refer to Air for Combustion
and Ventilation require-
ments (page 5)
POSSIBLE CAUSE
1. Not enough fresh air is
available
2. Low line pressure
3. O D S / p i l o t i s p a r t i a l l y
clogged
1. Residues from manufactur-
ing processes
1. Turning control knob to
HIGH or position 5 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 heat-
ing or contracting while
cooling
1. When heated, vapors from
furniture polish, wax, carpet
cleaners, etc. may turn into
white powder residue
1. Not enough combustion/
ventilation air