© 2021 United States Stove Company
19
PROBLEM
POSSIBLE CAUSE
REMEDY
Burner does not light
after pilot is lit.
Burner orifice is clogged.
Clean burner orifice or replace burner orifice.
Burner orifice diameter is too
small.
Replace burner orifice.
Inlet gas pressure is too low.
Contact local Gas Company.
Delayed ignition of
burner.
Manifold pressure is too low.
Contact local Gas Company.
Burner or pilot orifice is clogged.
Clean burner or pilot orifice or replace it.
Burner
backfiring
during combustion.
Burner orifice is clogged or
damaged.
Clean burner orifice or replace it.
Gas regulator defective.
Replace gas regulator.
Yellow flame during
burner combustion.
Inlet pipe is blocked.
Remove the blockage.
Incorrect connections of pipes.
Connect pipes according to installation
instructions.
Gas regulator defective.
Replace gas regulator.
Slight smoke or
odor during initial
operation.
Residues from manufacturing
processes.
Problem will stop after a while of operation.
Heater produces a
whistling noise when
burner is lit.
Turning control knob to HI position
when burner is cold.
Turn control knob to LO position and let
warm up for a minute.
Air in gas line.
Operate burner until air is removed from line.
Have gas line checked by local Gas Company.
Dirty or partially clogged burner
orifice.
Clean burner orifice or replace it.
Heater produces a
clicking/ticking noise
just after burner is lit
or shut off.
Metal expanding while heating or
contracting while cooling.
This is common with most heaters. If noise
is excessive, contact qualified service person.
Heater produces
unwanted odors.
Gas leak (see WARNING statement
below).
Locate and correct all leaks (see Checking
Gas Connections section)
Heater shuts off in
use.
Low line pressure.
Contact local Gas Company.
Pilot is partially clogged.
Clean pilot.
Gas odor even when
control knob is in OFF
position.
Gas leak. See WARNING statement
below.
Locate and correct all leaks (see Checking
Gas Connections section)
Control valve defective.
Replace control valve.
TROUBLESHOOTING
WARNING IF YOU SMELL GAS:
• SHUT OFF GAS SUPPLY.
• DO NOT TRY TO LIGHT ANY APPLIANCE
• DO NOT TOUCH ANY ELECTRICAL SWITCH, DO NOT USE ANY PHONE IN YOUR BUILDING.
• IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A NEIGHBOR’S PHONE. FOLLOW THE GAS
SUPPLIER’S INSTRUCTIONS.
• IF YOU CANNOT REACH YOUR GAS SUPPLIER, CALL THE FIRE DEPARTMENT.