—5—
2. Close the external manual gas valve. (See Fig. 8.)
3. Turn OFF the electrical supply to your furnace. (See Fig. 9.)
4. Remove the furnace access door(s).
a. Downflow/Horizontal—remove blower door after removing 2 screws first, then remove the control door. (See Fig. 10.)
b. Upflow—remove control door. (See Fig. 11.)
5. The gas valve will have EITHER a control knob (see Fig. 12) or control switch (see Fig. 13) to turn off and on. Turn the control knob or
switch on the gas valve to the OFF position and wait 5 minutes. Then smell for gas, including near the floor. If you smell gas, stop! Follow
operating instructions on main furnace door.
6. After waiting 5 minutes, turn the control knob or switch on the gas valve to the ON position. (See Fig. 14 or 15.)
7. Replace the access door(s). See Fig. 16 for upflow and Fig. 17 for downflow. Replace control door first on downflow furnaces. Then replace
blower door. (For downflow/horizontal furnaces only, secure blower door with two screws.)
CL
O
S
E
8
9
®
®
10
11
FF
O
O
F
F
2
3
1
M
P
ON
O
F
F
C
12
13
2
3
1
M
P
ON
C
O
F
F
ON
14
15
