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Video & Articles: Appliance & Equipment RepairCarrier/Gree ETAC Heat Pump Ambient Temperature Sensor Replacement 3900012123 
Carrier/Gree ETAC Heat Pump Ambient Temperature Sensor Replacement 3900012123
Skill Level
Total Parts Cost
$5.31Estimated Savings
$112.5008:46
- Description
This video provides step-by-step instructions for replacing the ambient temperature sensor on a Carrier/Gree ETAC Heat Pump Unit. The most common reason for replacing this part is if the unit is not cooling or heating to the proper temperature.
All of the information in this video is applicable to the following brands: Carrier, Gree
All of the information in this video is applicable to the following brands: Carrier, Gree
Step By Step Instructions
1
To replace the ambient temperature sensor in this carrier/gree etac heat pump unit…
2
… you will need a #1 phillips-head screwdriver, a #2 phillips-head screwdriver, wire cutters, and zip-ties.
3
Before you begin the procedure, be sure to turn the unit off…
4
…and disconnect the power supply.
5
Remove the unit’s front panel by pulling the bottom of the panel out to release it from the tabs…then lift up.
6
Use the #2 phillips-head screwdriver to unthread the screw securing the control panel.
7
Detach the control panel.
8
Now unthread the lower right screw securing the junction box cover.
9
Unthread the three screws securing the junction box itself.
10
Pull back the cover to fully detach the junction box from the power cord.
11
Disconnect the power cord wire connecter.
12
Next, unthread the six screws securing the control box’s side access cover.
13
Remove the cover.
14
Unthread the four screws to release the left access cover.
15
Now unthread the five screws securing the middle access cover.
16
If applicable, disconnect the wall thermostat wire connecter and the energy management wire connecter.
17
Disconnect the relay board and transformer wire connecters from the main control board for better access to the board.
18
Release the lock securing the ambient temperature sensor wire connecter to the main control board…
19
… then disconnect the wire connecter.
20
Use the wire cutters to cut the three zip-ties bundling the wires together.
21
You can now detach the sensor from the mounting brackets and pull the old component free.
22
To install the new ambient temperature sensor…
23
… feed the wire connecter through the wire access hole in the side of the control box…
24
… and connect it to the main control board.
25
Use the wire connecter lock to secure the connecter.
26
Feed the sensor through the right mounting bracket and snap it into place in the middle bracket.
27
Use new zip-ties to bundle the wires together.
28
Reconnect the relay board and transformer wire connecters to the main control board…
29
… then realign the middle access cover and thread the five screws.
30
Reconnect the thermostat and energy management wire connecters if applicable.
31
Reposition the left access cover…
32
… and rethread the screws.
33
Realign the side access cover…
34
… and thread the screws to secure.
35
Reconnect the power cord wire connecter…
36
… then reposition the junction box and rethread the screws.
37
Rethread the lower right screw to fully secure the cover.
38
Realign the control panel and thread the screw to secure.
39
Reinstall the front panel by aligning the tabs over the top rail then push the bottom of the panel in until it snaps into place.
40
Restore power to the unit…
41
… and the etac heat pump system should be ready for use.
Description
This video provides step-by-step instructions for replacing the ambient temperature sensor on a Carrier/Gree ETAC Heat Pump Unit. The most common reason for replacing this part is if the unit is not cooling or heating to the proper temperature.
All of the information in this video is applicable to the following brands: Carrier, Gree
All of the information in this video is applicable to the following brands: Carrier, Gree
Step-By-Step Instructions
1
To replace the ambient temperature sensor in this carrier/gree etac heat pump unit…
2
… you will need a #1 phillips-head screwdriver, a #2 phillips-head screwdriver, wire cutters, and zip-ties.
3
Before you begin the procedure, be sure to turn the unit off…
4
…and disconnect the power supply.
5
Remove the unit’s front panel by pulling the bottom of the panel out to release it from the tabs…then lift up.
6
Use the #2 phillips-head screwdriver to unthread the screw securing the control panel.
7
Detach the control panel.
8
Now unthread the lower right screw securing the junction box cover.
9
Unthread the three screws securing the junction box itself.
10
Pull back the cover to fully detach the junction box from the power cord.
11
Disconnect the power cord wire connecter.
12
Next, unthread the six screws securing the control box’s side access cover.
13
Remove the cover.
14
Unthread the four screws to release the left access cover.
15
Now unthread the five screws securing the middle access cover.
16
If applicable, disconnect the wall thermostat wire connecter and the energy management wire connecter.
17
Disconnect the relay board and transformer wire connecters from the main control board for better access to the board.
18
Release the lock securing the ambient temperature sensor wire connecter to the main control board…
19
… then disconnect the wire connecter.
20
Use the wire cutters to cut the three zip-ties bundling the wires together.
21
You can now detach the sensor from the mounting brackets and pull the old component free.
22
To install the new ambient temperature sensor…
23
… feed the wire connecter through the wire access hole in the side of the control box…
24
… and connect it to the main control board.
25
Use the wire connecter lock to secure the connecter.
26
Feed the sensor through the right mounting bracket and snap it into place in the middle bracket.
27
Use new zip-ties to bundle the wires together.
28
Reconnect the relay board and transformer wire connecters to the main control board…
29
… then realign the middle access cover and thread the five screws.
30
Reconnect the thermostat and energy management wire connecters if applicable.
31
Reposition the left access cover…
32
… and rethread the screws.
33
Realign the side access cover…
34
… and thread the screws to secure.
35
Reconnect the power cord wire connecter…
36
… then reposition the junction box and rethread the screws.
37
Rethread the lower right screw to fully secure the cover.
38
Realign the control panel and thread the screw to secure.
39
Reinstall the front panel by aligning the tabs over the top rail then push the bottom of the panel in until it snaps into place.
40
Restore power to the unit…
41
… and the etac heat pump system should be ready for use.
Applicable Product Model
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