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OBSERVED
PROBLEM
5. Delayed ignition of burner
6. Burner backfiring during
combustion
7. Slight smoke or odor during
initial operation
8. Heater produces a whistling
noise when burner is lit
POSSIBLE
CAUSE
1. Manifold pressure is too low
2. Burner orifice is clogged
1. Burner orifice is clogged or
damaged
2. Burner damaged
3. Gas regulator defective
1. Residues from manufacturing
process
1. Turning control knob to “HI”
position when burner is cold
(if equipped with this type of
valve)
2. Air in gas line
3. Air passageways on heater
blocked
4. Dirty or partially clogged
burner orifice
SOLUTION
1. Contact local propane gas
company
2. Clean burner (see “Cleaning
and Maintenance”) or replace
burner orifice
1. Clean burner (see “Cleaning
and Maintenance”) or replace
burner orifice
2. Replace burner
3. Replace gas regulator
1. Problem will stop after a few
hours of operation
1. Turn control knob to “LOW”
position and allow to warm
2. Operate burner until air is
removed from line. Call
local propane company to
check gas line.
3. Observe minimum
installation clearances
4. Clean burner or replace
orifice
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