Humming A/C

[macattax]

I am getting a sort of humming noise fro the A/C control unit.
Symptoms are that when you start the car you get this humming sound from a/c. I have the temperature set at 24 these days.
The blower A/C doesnt control the blower accordingly.
After the car has been running a while the blower works more efficently with the A/c.
I thought it was the blower and replaced it but thats not the case.

Is there a temperature sensor connected to the A/C which could be on the fritz?
Its like it takes ages for the A/C to detect what temp the inside of the car is and blow accordingly.

Any ideas guys?

 

[macattax]

Bump! anyone?

 

[andybnwc]

i got a loud buzzing noise coming from the ac unit so took it out and took it to pieces cleaned all connectors then put back together and everything was fine , maybe try this first before shelling out money

 

[macattax]

Did you have a lag before the a/c started using the blower efficiently?

 

[andybnwc]

well it used to start blowing harder about a minute after i set of driving if thats what you mean