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32-5035-08
User’s Information
The Problem Solver
A furnace is not a household appliance. It is complex
and requires professional maintenance and repair.
Attempts at “do-it-yourself” repairs on an in-warranty
unit may void the remainder of your warranty.
▲
WARNING
!
CARBON MONOXIDE POISONING HAZARD
DO NOT ATTEMPT TO CHANGE THE VENTING SYSTEM.
FAILURE TO FOLLOW THE INSTALLATION AND OPER-
ATION INSTRUCTIONS FOR THE VENTING SYSTEM’S
OPERATION COULD RESULT IN CARBON MONOXIDE
POISONING OR DEATH.
Save time and money. Before calling for service, check the following:
Other than performing the simple maintenance rec-
ommended in this manual, you should not attempt to
make any adjustments to your furnace. Your dealer
will be able to take care of any questions or problems
you may have. A periodic inspection of your furnace
should be made by a qualifi ed service agency at the
start of each heating season.
In the event that electrical, fuel, or mechanical failures
occur, you should immediately turn the gas supply off
at the manual gas valve located on the gas pipe lead-
ing to the furnace. Also, turn off electrical power to the
furnace and contact a qualifi ed service agency.
Keep your furnace looking like new for years.
Clean the enamel fi nish of your furnace with ordi-
nary soap and water. For stubborn grease spots, use
a household detergent. Lacquer thinner or other syn-
thetic solvents may damage the fi nish.
Problem
Possible Trouble
Possible Remedy
No Heating --
Blower does not operate
1. Thermostat set incorrectly.
2. Blown fuse or tripped circuit breaker.
3. Burner does not ignite.
4. Main gas line turned off.
5. Blower door removed or ajar.
6. Lockout
1. Adjust thermostat. See operating instructions.
2. Replace or reset protective device or call for servicer.
3. Call Servicer.
4. Have gas company check.
5. Close door securely to restore power to blower and gas
valve.
6. Cycle power twice in thirty seconds for furnaces other
than *UH3 and *DH3.
Cycle power once for furnace models *UH3 and *DH3
Insufficient Heating --
Blower operates continuously.
1. Dirty air filters.
2. Blocked supply or return registers.
1. Clean or replace filters.
2. Make sure registers are open and no obstacles are blocking
off the air
Unusual Noise
Call your servicer.
DOWNFLOW (Vertical) FILTER TABLE
REQUIRED FILTERS - DOWNFLOW
CABINET WIDTH
FILTER QUANTITY & SIZE
17-1/2"
2 - 14" X 20" X 1"
21"
2 - 16" X 20" X 1"
24-1/2"
2 - 16" X 20" X 1"
DOWNFLOW/HORIZONTAL FILTER
Airfl o
w
