Chevy impala 2001 ac

The blower motor relay is energized when the Blower Motor Control is set to the High position. This removes the blower motor resistors from the circuit and battery voltage is then applied directly from the HVAC BLO fuse (RH IP Accessory Wiring Junction Block) to the blower motor though the relay switch contacts. The blower motor then runs at high speed.

HVAC Blower Controls Circuit Description
The blower motor is a variable speed motor. The motor operates at a higher rate when voltage is increased to the maximum level.
The blower motor resistors reduce the voltage supplied from the A/C FAN fuse (LH IP Accessory Wiring Junction Block) when the blower control is set at low and medium speeds (speeds 1-4). The blower motor relay is energized when the Blower Motor Control is set to the High position. This removes the blower motor resistors from the circuit and battery voltage is then applied directly from the HVAC BLO fuse (RH IP Accessory Wiring Junction Block) to the blower motor though the relay switch contacts. The blower motor then runs at high speed.

Question edited for clarity.

Question moved to sub category.

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Hello JJ, the problem areas to check would be:

1. headlight and panel dimmer switch.
2. interior door lamp control module
3. keyless entry module
4. door lock control module
5. door jam switches.
6. wiring problems.

Most of the time, it is the door switch on the drivers side, that is the problem.
I hope this information is helpful.

This is caused by a bad blower motor resistor.If you replace that should take care of the blower motor speed issue.

your check engine light will give you information that will help solve the problem-get the computer scanned, go to a retail auto parts store, they all do it for nothing. Write down the actual codes, and come back here with the codes, you will get the help you need.

replace blower motor resister

2003 Chevy Impala w/dual zone heat/AC. The fan stopped working in speed 1 adn 2. Do I need to replace the switch?

This is a common problem with the 2001 Impala. The intermediate shaft in the steering needs to be lubricated or replaced. There is also a recall on some Impala's. http://www-odi.nhtsa.dot.gov/recalls/results.cfm I suggest you take it to a trusted Chevy dealer and have this repaired.

Blower housing resistor fried up.You will have to replace whole blower assembly.

P0507-- idle speed high