Desa FB-3B - Manual (Page 16)

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INFRARED PROPANE/LP GAS HEATER
OBSERVED PROBLEM
Burner(s) does not light after ODS/pilot is lit
Delayed ignition of burner(s)
Burner backfiring during combustion
Burner plaque(s) does not glow
Slight smoke or odor during initial operation
Heater produces a clicking/ticking noise
just after burner is lit or shut off
White powder residue forming within burner
box or on adjacent walls or furniture
TROUBLESHOOTING
Continued
REMEDY
1. Clean burner orifice(s) (see Cleaning
and Maintenance, page 14) or replace
burner orifice(s)
2. Replace burner orifice(s)
3. Contact local propane/LP gas company
1. Contact local propane/LP gas company
2. Clean burner orifice(s) (see Cleaning
and Maintenance, page 14) or replace
burner orifice(s)
1. Clean burner orifice(s) (see Cleaning
and Maintenance, page 14) or replace
burner orifice(s)
2. Replace burner
3. Replace gas regulator
1. Replace burner
2. Contact local propane/LP gas company
3. Turn control knob until it locks at de-
sired setting
1. Problem will stop after a few hours of
operation
1. This is common with most heaters. If
noise is excessive, contact qualified ser-
vice person
1. Turn heater off when using furniture
polish, wax, carpet cleaners, or similar
products
POSSIBLE CAUSE
1. Burner orifice(s) is clogged
2. Burner orifice(s) diameter is too small
3. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice(s) is clogged
1. Burner orifice(s) is clogged or damaged
2. Burner damaged
3. Gas regulator defective
1. Plaque damaged
2. Inlet gas pressure is too low
3. Control knob set between locked
positions
1. Residues from manufacturing processes
1. Metal expanding while heating or con-
tracting while cooling
1. When heated, vapors from furniture pol-
ish, wax, carpet cleaners, etc. turn into
white powder residue
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