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During a seasonal check the service technician will inspect the
indoor blower, the pilot and burner flames along with the vent-
ing system.
Venting System
Annually (before heating season) inspect furnace venting sys-
tem, heat exchanger, burners and pilot for corrosion, deteriora-
tion, or deposits of debris. Remove any obstructions.
Inspect furnace venting system to make sure it is in place,
physically sound, and without holes or blockage. Vent connec-
tor must be in correct position, sloped upward and be physical-
ly sound without holes.
Inspect furnace return air duct connection to ensure duct is
sealed to the furnace and terminates outside the space con-
taining the furnace.
Inspect the physical support of the furnace to guarantee that it
is sound without sagging, cracks or gaps around base and it
maintains seal between base and support.
Inspect and clean the condensate traps and drain.
Blower
Check and clean blower wheel for any debris. Blower motor is
pre-lubricated for extended bearing life. No further lubrication
is needed.
CAUTION
Using flame sight glass, check burner flame peri-
odically to ensure proper operation.
Burner Flame
Set thermostat to call for heat. Allow unit to operate for a
few minutes to establish normal burning conditions. Check
burner flame by observation. Flame should be predomi-
nantly blue and strong in appearance.
Contact your Lennox dealer for a periodic unit inspection
by a qualified service technician.
Service Reminder
Call your Lennox service technician if unit is inoperative. Be-
fore calling, always check the following to be sure service is
required.
1 - Check that electrical disconnect switches are
ON.
2 -Check room thermostat for proper setting.
3 - Replace any blown fuses or reset circuit breakers.
4 - Gas valve should be
ON
.
5 - Air filter should not be plugged limiting air flow.
6 - Is gas turned on at meter?
7 - Is manual main shut-off valve open?
Safety Precautions
If you discover any of the following, shut down your unit,
and contact an independent Lennox dealer for an in-
spection by a qualified technician.
If you repeatedly hear any new or unfamiliar sounds while
your unit is operating, there may be a problem. For exam-
ple, poorly performing burners can produce unfamiliar
noises.
If you smell any unusual odors, your unit may be operating
improperly. For example, units can give off unfamiliar
odors if components are required to operate in abnormal
conditions.
Look for visible signs of a malfunctioning unit. Examples
include unusual amounts of condensate on windows in-
side your house, visibly burnt components or unusual dirt
or rust accumulations on the vent pipe or in the unit.
If you experience headache, nausea, fatigue, or dizzi-
ness, the cause could be exposure to carbon monoxide
gas. This is often misdiagnosed as the flu because symp-
toms are similar. If you suffer from flu-like symptoms that
are exaggerated at home, but seem to subside 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 be-
fore either personal injury or property damage occurs. Do not
hesitate to contact a qualified service technician as an invest-
ment in your well being.
Planned Service
Youshouldexpectaservicetechniciantocheckthefollowing
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 unob-
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, dam-
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 unit.
Operating performance
- Unit must be observed during op-
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 neces-
sary to temporarily shut down the furnace until the items can
be repaired or replaced.
Pay attention to your furnace.
Situations can arise be-
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.