Desa VTGF33NRA - Manual (Page 27)

www.desatech.com 110112-01C 27
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. No power available to fire-
place
2. Manual ignition bypass
switch not in OFF position
3. Wall switch wire harness is
disconnected
1. Burner orifice clogged
2. Inlet gas pressure is too low
1. Manifold pressure is too
low
2. Burner orifice clogged
1. Burner orifice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
3. Residues from manufacturing
processes and logs curing
1. Not enough combustion/ven-
tilation air
1. Turning control knob to HI
position when burner is cold
2. Air in gas line
3. Air passageways on heater
blocked
4. Dirty or partially clogged
burner orifice
REMEDY
1. Make sure power cord is
plugged into an electrical
outlet and outlet has power
2. Place manual ignition bypass
switch in OFF position
3. Check continuity of wall
switch wire harness. Make
sure plug on wall switch wire
harness is fully inserted into
socket on circuit board in fire-
place. Replace if necessary
1. Clean burner (see Cleaning
and Maintenance, page 25) or
replace burner orifice
2. Contact local gas company
1. Contact local natural or pro-
pane/LP gas company
2. Clean burner (see Cleaning
and Maintenance, page 25) or
replace burner orifice
1. Clean burner (see Cleaning
and Maintenance, page 25) or
replace burner orifice
2. Replace damaged burner
3. Replace regulator
1. Check burner for dirt and
debris. If found, clean burner
(see Cleaning and Mainte-
nance, page 25)
2. Replace regulator
3. Problem will stop after a few
hours of operation
1. Refer to Air for Combustion
and Ventilation requirements
(page 5)
1. Turn control knob to LO 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 page 9)
4. Clean burner (see Cleaning
and Maintenance, page 25) or
replace burner orifice
OBSERVED PROBLEM
When wall switch button is
pressed, there is no response
from fireplace
Burner does not light after ODS/
pilot is lit
Delayed ignition burner
Burner backfiring during com-
bustion
Slight smoke or odor during initial
operation
Moisture/condensation noticed
on windows
Heater produces a whistling noise
when burner is lit