Check the burner flames for good adjustment, a stable, soft and
blue flame that is not curling, floating or lifting off.
To avoid personal injury or death due to electrical shock,
do not remove any internal compartment covers or
attempt any adjustment. Contact a qualified servicer at
once if an abnormal flame should develop.
At least once a year, prior to or during the heating season, make a
visual check of the burner flames.
NOTE: This will involve removing and reinstalling the heat
exchanger door on the unit, which is held by 2 screws. If you are
uncertain about your ability to do this, contact a qualified
If a strong wind is blowing, it may alter the airflow pattern within
the unit enough that an inspection of the burner flames is not
1. Disconnect the electric power and gas supply to the unit.
2. Remove the screws securing the manifold to the burner
retention bracket. Remove the manifold and rotate each
burner counterclockwise to remove.
Unit Fails to Operate Properly
Review "Sequence of Operation" and visually inspect the
following before troubleshooting:
Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage,
personal injury or death.
3. Remove the burners.
4. Use a bottle brush to clean burner insert and inside of the
5. Replace the burners and manifold.
6. Inspect the burner assembly for proper seating of burners in
7. Reconnect the electrical power and gas supply.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
Always verify proper operation after servicing.
For further information on the yearly inspection, consult the User
Manual. It is recommended that a qualified servicer inspect and
service the unit at least once each year.
Turn the unit on at the thermostat. Wait a few minutes, since any
dislodged dust will alter the normal flame appearance. Flames
should be predominantly blue and directed into the tubes. They
should not be yellow. They should extend directly outward from
the burner ports without curling downward, floating or lifting off of
The following presents probable causes of questionable unit
Remove the control box access panel and note the number of
diagnostic status light LED flashes. Refer to Diagnostic Indicator
Chart for an interpretation of the signal and to this section for an
A. Burner bracket
Ignition Control Error Codes