2
WELCOME TO 
TODAY’S GENERATION 
OF COMFORT
Congratulations! Your new, high-
efficiency gas furnace is a sound invest-
ment which will reward you and your 
family with years of warm memories 
winter after winter.
Not only is your new furnace energy 
efficient, it is also extremely reliable 
and supplies superior home comfort. 
Spend just a few minutes with this 
booklet to learn about the operation 
of your new furnace and the small  
amount of maintenance it takes to 
keep it operating at peak efficiency. 
Years went into the development of 
your new furnace. Take a little time 
now to assure its most efficient opera-
tion for years to come.
UPFLOW/HORIZONTAL 
FURNACE COMPONENTS
 
Relief Box
Gas Valve Control Knob or Electric Switch (On/Off)
2-Stage Gas Valve
Manual Reset Flame Rollout Switch (2)
Gas Burner
Flame Sensor
Hot Surface Ignitor
Rating Plate
Status LED Light
Blower and Blower Motor
Draft Safeguard Tube and Switch
Gas Manifold
Blower Door Safety Switch
Filter Retainer
Air Filter
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
MODEL 58UHV, 58UXT, AND 58UXV
UPFLOW/HORIZONTAL FURNACES
2
MODEL 58DXT
DOWNFLOW FURNACES
1
5
2
4
6
7
10
11
14
15
9
12
3
8
13