Problem
Burner does not light after
ODS/pilot is lit.
Delayed ignition of
burner.
Burner backfiring during
combustion.
Excessive yellow flame
during burner combus-
tion (more than 8").
Gas odor during com-
bustion.
Slight smoke or odor
during initial operation.
Heater produces a whis-
tling noise when burner
is lit.
26
TROUBLESHOOTING
Possible Cause
1. Burner orifice is clogged.
2. Burner orifice diameter is too
small.
3. Inlet gas pressure is too low.
1. Manifold pressure is too low.
2. Burner orifice is clogged.
1. Burner orifice is clogged or
damaged.
2. Burner is damaged.
3. Gas regulator is damaged.
1. Not enough air.
2. Gas regulator is defective.
3. Inlet gas pressure is too low.
4. Bypass valve open with unit
connected to LP gas (see
Pressure Switch, page 24).
1. Foreign matter between
control valve and burner.
2. Gas leak. (See Warning
Statement at top of page 24).
1. Residues from manufactur-
ing process.
1. Turning control knob to high
position when burner is cold.
2. Air in gas line.
3. Air passageways on heater
are blocked.
4. Dirty or partially clogged
burner orifice.
www.sureheat.com
Corrective Action
1. Clean burner orifice (see
Care and Maintenance,
page 23) or replace burner
orifice.
2. Replace burner orifice.
3. Contact local gas supplier.
1. Contact local gas supplier.
2. Clean burner (see Care and
Maintenance, page 23) or
replace burner orifice.
1. Clean burner orifice (see
Care and Maintenance,
page 23) or replace burner
orifice.
2. Replace burner.
3. Replace gas regulator.
1. Check burner for dirt and
debris. If found, clean burner
(see Care and Maintenance,
page 23).
2. Replace gas regulator.
3. Contact local gas supplier.
4. Turn unit off. Verify gas con-
nection to proper gas type.
Close bypass. Never open
bypass on LP gas!
1. Contact a qualified service
technician to remove foreign
matter.
2. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 17).
1. Problem will stop after a few
hours of operation.
1. Turn control knob to low
position and let warm up for
a minute.
2. Operate burner until air is
removed from line. Have gas
line checked by local gas
supplier.
3 Observe minimum installa-
tion clearances (Figure 4,
page 10).
4 Clean burner (see Care and
Maintenance, page 23) or
replace burner orifice.
200208-01C