Lennox International Inc. G21Q - Manual (Page 6)

Page 5
Service Reminder
Call your Lennox service technician if the unit is inopĆ
erative. Before calling, always check the following to
be sure service is required:
1- Be sure electrical switches are ON.
2- Check the room thermostat for proper setting.
3- Replace any blown fuses or reset circuit breakers.
4- Make sure gas valve is on.
5- Blower access panel is in place.
6- Air filter must be clean.
Safety Precautions
If you discover any of the following, shut down your
unit, and contact an independent Lennox dealer for
an inspection by a qualified technician.
D
If you repeatedly hear any new or unfamiliar sounds
while your unit is operating, there may be a problem.
For example, poorly performing burners can produce
unfamiliar noises.
D
If you smell any unusual odors, your unit may be operĆ
ating improperly. For example, units can give off unfaĆ
miliar odors if components are required to operate in
abnormal conditions.
D
Look for visible signs of a malfunctioning unit. ExamĆ
ples include unusual amounts of condensate on winĆ
dows inside your house, visibly burnt components or
unusual dirt or rust accumulations on the vent pipe or
in the unit.
D
If you experience headache, nausea, fatigue, or dizziĆ
ness, the cause could be exposure to carbon monoxĆ
ide gas. This is often misdiagnosed as the flu because
symptoms are similar. If you suffer from flu-like sympĆ
toms that are exaggerated at home, but seem to subĆ
side while you are away from the house, exposure to
carbon monoxide could be the cause.
Your vigilance may pay off in early detection of a problem
before either personal injury or property damage occurs.
Do not hesitate to contact a qualified service technician as
an investment in your well being.
Planned Service
You should expect a service technician to check the following
items during an annual inspection. Power to the unit must be
shut off for the service technician's safety.
Fresh air grilles and louvers (on the unit and in the room
where the furnace is installed) - Must be open and unobĆ
structed to provide combustion air.
Burners- Must be inspected for rust, dirt, or signs of water.
Vent pipe - Must be inspected for dirt, signs of water, damĆ
aged or sagging unsupported pipe, or disconnected joints.
Unit appearance - Must be inspected for rust, dirt, signs of
water, burnt or damaged wires, or components.
Blower access door - Must be properly in place and provide
a seal between the return air and the room where the furnace
is installed.
Return air duct - Must be properly attached and provide an
airtight seal to the unit.
Operating performance - Unit must be observed during opĆ
eration to monitor proper performance of the unit and the
vent system.
Combustion gases - Flue products must be analyzed and
compared to the unit specifications.
Problems detected during the inspection may make it necesĆ
sary to temporarily shut down the furnace until the items can
be repaired or replaced.
Pay attention to your furnace. Situations can arise beĆ
tween annual furnace inspections that may result in unsafe
operation. For instance, items innocently stored next to the
furnace may obstruct the combustion air supply. This could
cause incomplete combustion and the production of carbon
monoxide gas.