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120926-26C10
REPLACING TRANSFORMER
1. Follow steps 1 through 3 under Replacing
Heater/Blower, page 9.
2. Disconnect transformer wires from control
board.
3. Remove screws from outside of rebox
surround to remove transformer (see
Figure 14).
4. Remove and discard transformer.
5. Place new transformer against inside
of rebox surround and replace screws
removed in step 3.
6. Reconnect transformer wires to control
board (see Wiring Diagram, page 12).
7. Replace top panel and screws.
8. Replace trim
Figure 14 - Removing Transformer
Transformer
Screws
5. Reconnect wires to main control board
(see Wiring Diagram, page 12).
6. Replace top panel and screws.
7. Replace trim
Figure 16 - Replacing Settings Control
Board
Screws
Settings
Control Board
REPLACING MAIN CONTROL BOARD
1. Follow steps 1 through 3 under Replacing
Heater/Blower, page 9.
2. Disconnect wires to main control board.
3. Squeeze top of standoffs to remove main
control board and discard.
4. Gently push new control board onto
standoffs to install.
Figure 15 - Control Board
Main Control
Board
Standoffs
Transformer
Figure 13 - Removing Heater from
Blower
Heater
Blower
CLEANING AND MAINTENANCE
Continued
REPLACING SETTINGS CONTROL
BOARD
1. Follow steps 1 through 3 under Replacing
Heater/Blower, page 9.
2. Disconnect wires from main control
board.
3. Remove screws from bracket to remove
settings control board.
4. Place new settings control board into posi-
tion making sure each control is aligned
with slot in panel. Install using screws
from step 3. DO NOT overtighten. This
will damage control board.
5. Reconnect wires to main control board
(see Wiring Diagram, page 12).
6. Replace top panel and screws.
7. Replace trim