Carrier Official Manual with Maintenance Guidelines for Your Furnace

Only trained and qualified personnel should install, repair, or service heating equipment. Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters.

All other operations must be performed by trained and qualified service agency personnel. Observe safety precautions in this manual, on tags, and on labels attached to the furnace, and other safety precautions that may apply.

With proper maintenance and care, your furnace will operate economically and dependably. Instructions for basic maintenance are found on this and the following pages. However, before beginning maintenance, follow these safety precautions:

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury/death.

Turn off electrical power supply to your furnace before removing the access doors to service or perform maintenance.

!CAUTION

CUT HAZARD

Failure to follow this caution may result in minor personal injury.

Although special care has been taken to minimize sharp edges, be extremely careful when handling parts or reaching into the furnace.

Filtering Out Trouble

!CAUTION

UNIT PERFORMANCE HAZARD

Failure to follow this caution may result in product damage.

Never operate your furnace without a filter in place. Doing so may damage the furnace blower motor. An accumulation of dust and lint on internal parts of your furnace can cause a loss of efficiency.

A dirty air filter will cause a loss of airflow in your duct system. When excessive loss of airflow occurs, the furnace may cycle on its safety controls. If this condition is left unattended, the furnace will eventually lock out. It is recommended that the furnace air filter be checked every 3 or 4 weeks and cleaned if necessary.

If installed with factory-specified disposable media filter, check or replace filter before each heating and cooling season. Replace disposable media filter at least once a year.

The air filter is normally located in the blower compartment or in the factory-supplied filter cabinet attached to the side or bottom of the furnace casing. If air filter has been installed in another location, contact your dealer for instructions. To inspect, clean, and/or replace the air filter(s), follow these steps:

1.Turn off electrical supply to furnace. (See Fig. 19.)

2.Remove door/access panel.

a. Air Filters Located in Blower Compartment

(1.) Remove main furnace door. (See Fig. 22.)

(2.) Remove blower access panel. (See Fig. 23.)

NOTE: It will be necessary to remove 2 screws

b.Air Filters Located in Filter Cabinet

Remove filter cabinet door. (See Fig. 24 and 25.)

NOTE: It will be necessary to remove 1 thumbscrew

3.Remove air filter from furnace.

a.Air Filters Located in Blower Compartment Bottom:

(1.) Slide filter retainer sideways until it is free of latch. (See Fig. 26.)

(2.) Slide air filter out of furnace. (See Fig. 27.)

b.Air Filters Located in Blower Compartment Side: (1.) Remove filter retainer from latch. (See Fig. 28.)

(2.) Gently remove air filter and carefully turn the dirty side up (if dirty) to avoid spilling dirt from the filter. (See Fig. 29.)

c.Air Filter Located in Filter Cabinet:

Slide air filter out of furnace. Keep dirty side up (if dirty) to avoid spilling dirt. (See Fig. 30 and 31.)

4.Inspect the filter. If torn, replace it.

NOTE: If washable filter that was shipped with the furnace has been replaced by:

-Factory specified disposable media filter: Do not clean. If dirty, replace only with media filter having the same part number and size. Install with airflow direction arrow pointing towards blower. -Electronic air cleaner (EAC): Refer to EAC Owner’s Manual for maintenance information.

A05099

Fig. 22 - Removing Furnace Door

A93204

Fig. 23 - Removing Blower Access Panel

8