Heater/AC controls not working properly

CAR2LOW

MEMBER
2003 NISSAN ALTIMA
2.5L
4 CYL
2WD
AUTOMATIC
67,000 MILES

Hi! I have a problem with my heater/AC controls. The low and medium controls (1, 2 and 3) don't work. Only the high (4) works! Can anyone tell me what the problem is and how I can fix it? Thanks!

Friday, February 12th, 2021 AT 4:18 PM

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

It sounds like the blower motor resistor is bad. When they fail, most times they will only work on high speed.

Here are directions for replacement. The attached picture correlates with the directions.

_______________________

2003 Nissan-Datsun Altima L4-2.5L (QR25DE)
Procedures
Vehicle Heating and Air Conditioning Blower Motor Resistor Service and Repair Procedures
PROCEDURES
BLOWER FAN RESISTER

pic 1

Removal and Installation
1. Disconnect blower motor resistor connector.
2. Remove blower motor resistor screws and then remove it.

______________________________________

I hope this helps. Let me know if you have other questions.

Take care and God Bless,

Joe

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Friday, February 12th, 2021 AT 7:43 PM

CAR2LOW

MEMBER
2 POSTS

Thanks a lot Joe for your great help and God bless you!

Carlos

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Tuesday, February 16th, 2021 AT 6:48 PM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

You are very welcome. Let me know if you need anything. Also, please feel free to come back in the future if you need help.

By the way, did the resister take care of the problem?

Take care of yourself,

Joe

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Tuesday, February 16th, 2021 AT 7:21 PM

CARLOS LOUCAO

MEMBER
1 POST

Hi Joe! Just to let you know that the resistor did take care of the problem. Thanks a lot for your help once again and take care of yourself.

Have a good day!

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Thursday, April 29th, 2021 AT 8:02 AM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi

Thanks for the update. I'm glad to hear it took care of the problem.

Please feel free to come back anytime in the future if you need help or simply have a question. You are always welcome here.

Take care of yourself,

Joe