Burner and Pilot flame
color is yellow.
Check the gas type used, change to the correct
gas type.
Check the orifice installed. Replace it with
correct orifice for the gas type used.
Air shutter is partially or fully
closed. Not enough
combustion air.
Adjust the air shutter of the burner to
eliminate the yellow flame.
Burner flame is too
high or too low.
Pressure is too high or too
low.
Adjust pressure to standard. See standard
pressure settings.
Burner injector used is not
appropriate for the gas type
used.
Change the burner injector to appropriate gas
type used.
Change gas type used based on the product’s
rating label.
Replace safety gas valve.
Lack of primary air due
incorrect air shutter
adjustment.
Open air shutters to get rid of yellow flame.
Lint and dust may have
blocked primary air openings
or have collected inside the
burner tube or on the
underside of the burner ports
which reduced primary air
injection.
a. Clean and re-adjust the burners’ air
shutter.
b. Replace the burners if necessary.
The burner orifice/injector
might have spun out of line.
Check and re-align the injector to the burner.
Blocked or clogged injector
orifice.
a. Check and clean the injector orifice.
b. Replace it if necessary.
Adjust the air shutter of the burner to minimize
primary air input.
Wrong injector orifice size
installed.
Check the orifice size of the injector installed.
Replace injector if necessary.
If flashback occurs when the
burner gas valve is in an OFF
position. The gas valve is
probably leaking.
Adjust the gas supply pressure to required
standard.
Faulty or clogged burner.
Clean the burner or replace it if necessary.
Operated from cold start.
Warm up stage.
Allow the appliance to heat up.
The main burner injector and
burner are not aligned with
each other.
Align the main burner injector with the burner.
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