26
105706
DIRECT-VENT GAS FIREPLACE HEATER
VDVF36P and VDVF36ST Series
®
OBSERVED PROBLEM
Burner does not light after pilot is lit
Delayed ignition burner
Burner backfiring during combustion
Slight smoke or odor during initial operation
Heater produces a whistling noise when
burner is lit
Glass soots
Fireplace produces a clicking/ticking noise
just after burners are lit or shut off
REMEDY
1. Clean burner or replace burner orifice
2. Contact local propane/LP or natural gas
company
3. Reconnect leads
4. Replace thermopile
1. Contact local propane/LP or natural gas
company
2. Clean burner or replace burner orifice
1. Clean burner or replace burner orifice
2. Replace damaged burner
3. Replace gas control
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 burner until air is removed from
line. Have gas line checked by local pro-
pane/LP gas company
3. Clean burner or replace burner orifice
1. Adjust the log set so that the flame does
not excessively impinge on it
2. Inspect the opening at the base of the
burner to see that it is NOT packed with
any type of material
1. This is common. If noise is excessive,
contact qualified service person
POSSIBLE CAUSE
1. Burner orifice clogged
2. Inlet gas pressure is too low
3. Thermopile leads disconnected or im-
properly connected
4. Thermopile is defective
1. Manifold pressure is too low
2. Burner porting or orifice clogged
1. Burner orifice is clogged or damaged
2. Damaged burner
3. Gas regulator defective
1. Residues from manufacturing processes
and logs curing
1. Turning control knob to HI position
when burner is cold
2. Air in gas line
3. Dirty or partially clogged burner orifice
1. Flame impingement on logs
2. Debris around burner air mixer
1. Metal expanding while heating or con-
tracting while cooling
TROUBLESHOOTING
Continued
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