A.O. Smith GAHH 40 100 ユーザーズマニュアル

25

Important: Use only factory authorized replacement 

parts. If you lack the necessary skills to properly 

perform the installation, you should not proceed, but 

get help from a qualified service technician.

Removing the Electronic Control Display:
1.  Set the gas control valve/thermostat to its lowest 

setting by pressing the “COOLER” and “HOTTER” 

buttons together at the same time holding for 1 

second. Then press the “COOLER” button to the 

lowest setting (Figure 26).

2.  Turn gas control switch to the “OFF” position 

(located right side of the gas control valve/

thermostat) and turn off the gas supply to the unit 

(Figure 27). 

3.  Disconnect the electric connection by unplugging 

the transformer from the wall outlet (Figure 27).

4.  Remove the electronic control display by 

squeezing in both sides of the display and 

removing from the slots in the water heater’s front 

(Figure 28).

5.  Unplug the electronic control display electrical 

connector from the back of the electronic control 

display by depressing the locking snap and pulling 

out of the electronic control display electrical 

connection, also remove the power anode wire 

connector by pulling it off of the power anode 

control display terminal (Figure 29).

Installing the Electronic Control Display:
6.  Plug the power anode electrical wire terminal onto 

the power anode connector terminal (Figure 29).

7.  Insert the electronic control display electrical 

connector into the electronic control display 

electrical connection by aligning the connector 

pins (note orientation of the connector pins) and 

pressing down ensuring the electrical connector 

snap is locked into place (Figure 29).

8.  Install the electronic control display onto the front 

of the water heater by squeezing both sides of 

the electronic control display inserting the prongs 

into the water heater’s slots (please note the 

orientation of the electronic control display and 

the routing the wiring inside so as not be pinched 

between the display and the water heater’s front) 

(Figure 28).

9.  Turn on the electrical and the gas supplies to the 

water heater. Plug in the electric connection from 

the transformer to the electric outlet (Figure 27).

10. Restart the water heater by following the directions 

on the “Lighting and Operating Instructions” label 

located on the front of the water heater.

g

COOLER

HOTTER

Electronic Control Display

ON/OFF 

SWITCH

ON

OFF