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356486-UUM-I-0809

USER’S INFORMATION 

MANUAL

MODELS: 
All Residential Multi-position Gas Furnaces 
(33” Models)

EFFICIENCY
RATING
CERTIFIED

ISO 9001

Certified Quality

Management System

We recommend that the user read all sections of this 
manual and keep the manual for future reference.

 

SECTION I: SAFETY

This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.

Understand and pay particular attention to the signal words 

DANGER

,

WARNING

, or 

CAUTION

DANGER 

indicates an 

imminently

 hazardous situation, which, if not

avoided, 

will result in death or serious injury

.

WARNING 

indicates a 

potentially

 hazardous situation, which, if not

avoided, 

could result in death or serious injury

.

CAUTION 

indicates a potentially hazardous situation, which, if not

avoided 

may result in minor or moderate injury.

 It is also used to

alert against unsafe practices and hazards involving only property dam-
age.

1.

The furnace area must be kept clear and free of combustible mate-
rials, gasoline and other flammable vapors and liquids.

2.

Insulating materials may be combustible. The furnace must be
kept free and clear of insulating materials. The furnace area must
be examined when installed in an attic or other insulated space or
when insulation is added to be sure that the insulation material has
been kept away from the furnace.

3.

The furnace needs air for combustion in order to operate properly
and safely. Do not block or obstruct air openings on the furnace,
air openings to the area where the furnace is installed, or spaces
around the furnace.

4.

Follow the instructions exactly as shown on the OPERATING
INSTRUCTION LABEL on the furnace or the “START-UP AND
SHUTDOWN INSTRUCTIONS” section of this manual when light-
ing the furnace or turning the furnace off.

5.

Should the gas supply fail to shut off or if overheating occurs, shut
off the gas valve to the furnace before shutting off the electrical
supply.

6.

Do not use this furnace if any part has been under water. A flood-
damaged furnace is extremely dangerous. Attempts to use the fur-
nace can result in fire or explosion. A qualified service agency
should be contacted to inspect the furnace and replace all gas
controls, control system parts, electrical parts that have been wet
or the furnace if deemed necessary.

7.

NEVER . . .Store flammable materials of any kind near your fur-
nace. Gasoline, solvents, and other volatile liquids should be
stored only in approved containers outside your home. These
materials vaporize easily and are extremely dangerous.

8.

NEVER . . .Store cleaning materials near your furnace. Materials
such as bleaches, detergents, powdered cleansers, etc., can
cause corrosion of the heat exchangers. 

9.

NEVER . . . Use the area around your furnace as a storage area
for items which could block the normal flow of air. This flow of air is
required for ventilation of the various furnace components.

FIRE OR EXPLOSION HAZARD - 

Failure to follow safety warnings

exactly could result in serious injury, death, or property damage.

— Do not store or use gasoline or other flammable vapors and

liquids in the vicinity of this or any other appliance.

— WHAT TO DO IF YOU SMELL GAS:

Do not try to light any appliance.

Do not touch any electrical switch; do not use any phone (includ-
ing cell phone) in your building.

Leave the building immediately.

Immediately call your gas supplier from a neighbor’s phone. Fol-
low the gas supplier’s instructions.

If you cannot reach your gas supplier, call the fire department.

— Installation and service must be performed by a qualified 

installer, service agency or the gas supplier.

CONTACT INFORMATION

Go to website at www.york.com click on “about us”, then click on “contact us” and follow the instructions.

Contact us by mail:

Johnson Controls Unitary Products

Consumer Relations

5005 York Drive

Norman, OK 73069

TABLE OF CONTENTS

CONTACT INFORMATION   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SAFETY  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTRUCTIONS FOR EXAMINING THE 
FURNACE INSTALLATION   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
START-UP AND SHUTDOWN INSTRUCTIONS   . . . . . . . . . . . . . . . . 3

HOW YOUR GAS FURNACE WORKS   . . . . . . . . . . . . . . . . . . . . . . 3
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
TO TURN OFF THE APPLIANCE   . . . . . . . . . . . . . . . . . . . . . . . . . . 4

FURNACE MAINTENANCE - USER INFORMATION   . . . . . . . . . . . . 4

EXTERNAL AIR FILTERS   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

How to Clean your Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

BLOWER CARE   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
MOTOR LUBRICATION   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

SERVICE INFORMATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

TROUBLESHOOTING PROBLEMS  . . . . . . . . . . . . . . . . . . . . . . . . .5
FURNACE CONTROL DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . .5
FURNACE MAINTENANCE - DEALER/CONTRACTOR   . . . . . . . . .5
REPLACEMENT PARTS LIST   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

LIMITED WARRANTY  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

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