Filter
Top Products
– 28 –
To remove the selector board:
Remove the control panel bracket. (See Control
Panel Assembly.)
Pull the dial straight out from the control panel.
Disconnect wire harnesses from the selector
board at locations CN9 and CN13.
Disconnect the wire harness from the control
panel at location CN14.
Remove the 6 Phillips-head screws that attach
the selector board to the control panel.
1.
2.
3.
4.
5.
CN9
CN13
To remove the control panel:
To access the control panel it is necessary to remove
the control panel bracket, control, display, and
selector boards. (See Control Panel Assembly.)
Low Voltage Transformer
The low voltage transformer is held in place by 2
Phillips-head screws.
The control panel must be removed to access
the low voltage transformer. (See Control Panel
Assembly.)
The low voltage transformer is connected to the
power board at location CN7 and on the relay board
at location CN1.
Resistance Check
Disconnect the harness from the relay board at
location CN1.
Check the primary winding for approximate
resistance value between the white and black
wires of 23.2 Ω.
Disconnect the harness from the power board
at location CN7.
Check the secondary windings for approximate
resistance value between:
Yellow to black - 1.5 Ω
Black to white - 5.2 Ω
Red to brown - 1.1 Ω
Note: Voltage check for the transformer is:
Yellow to black - 13 VAC
Black to white - 20 VAC
Red to brown - 8 VAC
1.
2.
3.
4.
•
•
•
•
•
•