8
H
ORIZONTAL
U
NIT
F
ILTER
R
EMOVAL
Filters in horizontal installations are located in the central
return register or the ductwork near the furnace.
To remove:
1. Turn OFF electrical power to furnace.
2. Remove filter(s) from the central return register or
ductwork.
3. Replace filter(s) by reversing the procedure for removal.
4. Turn ON electrical power to furnace.
To remove all other filter configurations, consult with the
installing contractor.
M
EDIA
A
IR
F
ILTER
OR
E
LECTRONIC
A
IR
C
LEANER
R
EMOVAL
High efficiency filters are available in both electronic and
non-electronic types. These filters can do a better job of
catching small airborne particles. Contact your dealer for
further information.
If using a Media or Electronic Air Cleaner, follow the direc-
tions provided with the air cleaner for proper filter removal,
cleaning, and replacement.
F
ILTER
C
LEANING
AND
/
OR
R
EPLACEMENT
Disposable filters must be replaced with a filter or filters
of the same size as that which is removed. Filters must
comply with UL900 or CAN/ULC-S111 Standards.
Permanent filters must be cleaned, washed, and dried as
specified by the filter manufacturer. If it becomes neces-
sary to replace a permanent filter, it must be replaced with
a filter or filters of the same size as that which is removed.
Filters must comply with UL900 or CAN/ULC-S111 Standards.
When reinstalling filters, be careful to maintain correct
airflow direction.
T
ROUBLESHOOTING
/ B
EFORE
Y
OU
R
EQUEST
A
S
ERVICE
C
ALL
If your furnace is not operating or is performing improp-
erly, take time to perform the following checks before re-
questing service. A couple of simple checks may allow you
to avoid a service call. If the following steps do not resolve
the problem, contact a qualified servicer for further trouble-
shooting and/or repairs. Do not attempt troubleshooting
beyond that which is outlined in the following bullet points.
Do not attempt repairs yourself.
• Check the blower compartment sight glass. If LED is
flashing, record the number of flashes seen in sequence,
shutdown your unit as outlined in the “Furnace Start-
up” section and contact a qualified servicer for further
troubleshooting and/or repairs. Refer to Installation
Instructions for code identification. If not flashing,
continue with checks.
• Check thermostat for proper operation. Verify that it
is set on HEAT and that temperature (above room tem-
perature) setting is appropriate.
• Check the electrical panel for tripped circuit breakers
or failed fuses. Reset the circuit breakers or replace
fuses as necessary.
• Check to see that the manual gas shut-off valve exter-
nal to the furnace is in the ON position. If the valve is
in the OFF position, turn the gas ON following the start
up procedures outlined in the “Furnace Start-up” sec-
tion.
• Check for dirty filter(s). This in the most common cause
of improper furnace operation. Check your filter(s) at
least once a month and replace or clean filters as nec-
essary.
• Check for blocked return air or supply air grilles through-
out your home. Grilles may be blocked by furniture,
drapery, clothes, carpeting, etc. Clear any blockage.
• Check intake and vent terminations on high efficiency
furnaces to make sure they are not blocked.
