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AVFLST Vent Free Fireplace
Monessen • AVFLST42 Installation Instructions • 4118-900 Rev. B • 05/2020
TROUBLESHOOTING
WARNING!
•
Turn appliance OFF and allow to cool before
servicing.
•
Only a qualified service person should
service and repair the heater.
NOTE:
All troubleshooting items are listed in order of operation.
PROBLEM
POSSIBLE CAUSE
SOLUTION
Appliance produces unwanted odors.
Appliance burning vapors from paint, hair
spray, glues, etc.
Ventilate room. Stop using odor causing
products while heater is running.
Gas leak.
Locate and correct all leaks.
Initial burn off.
Ventilate room and turn unit on high until
odor is gone. Odor should be gone after
six hours of continuous use.
Appliance shuts off during use.
Not enough fresh air is available for
ODS/pilot to operate.
Open window and/or door for ventilation.
Low line pressure.
Contact local gas company.
ODS/pilot is partially clogged.
Clean ODS/pilot.
Burner does not light after ODS/pilot is lit.
Burner orifice is clogged.
Burner orifice is clogged.
Burner orifice diameter is too small.
Burner orifice diameter is too small.
Inlet gas pressure is too low.
Inlet gas pressure is too low.
Burner backfires during combustion.
Manifold gas pressure is too low.
Contact local gas company.
Burner orifice is clogged.
Clean burner or replace burner orifice.
Slight smoke or odor combustion.
Burner orifice is clogged or damaged.
Clean burner or replace burner orifice.
Burner is damaged.
Replace burner.
Gas regulator defective.
Replace gas regulator.
Heater produces a whistling noise when
burner is lit.
Air in gas line.
Operate burner until air is removed from
line. Have gas line checked by local gas
company.
Dirty of partially clogged burner orifices.
Clean burner or replace burner orifice.
No gas to pilot.
LP regulator shut down due to inlet
pressure too high.
Verify LP tank regulator is installed and
set at 11" to 13" w.c.
Replace regulator on heater.
With proper installation, operation, and maintenance your gas appliance will provide years of trouble-free service. If you
do experience a problem, this troubleshooting guide will assist a qualified service technician in the diagnosis of a prob-
lem and the corrective action to be taken. This troubleshooting guide can only be used by a qualified service technician.
Contact your dealer to arrange a service call by a qualified service technician.
