Desa VN600BA - Manual (Page 20)

www.desatech.com 110720-01J 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/tick-
ing noise just after burner is lit
or shut off
White powder residue forming
within burner box or on adjacent
walls or furniture
Moisture/condensation noticed
on windows
REMEDY
1. Open window and/or door for
ventilation
2. Contact local natural or pro-
pane/LP gas company
3. Clean ODS/pilot (see Cleaning
and Maintenance, 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
and Maintenance, page 17)
or replace burner orifice
1. This is common with most heat-
ers. If noise is excessive, contact
qualified service person
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. Not enough fresh air is avail-
able
2. Low line pressure
3. ODS/pilot is partially
clogged
1. Residues from manufacturing
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 heating
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/ven-
tilation air