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My S80 T6 90,000 miles does:

- When I turn the A/C, it makes hum sound then off and then on and off... Is it natural?

- My cruise control display goes on randomly and works. Many times the cruise control does not work. So should I change the whole cruise control module or is it just a switch problem? I would say the cruise control works 50% of the time.

- For the suspension (shocks, upper spring seats,...), should I necessarily go to Volvo specialists? One Volvo specialist told me that both front upper spring seats must be replaced. Then a month later, Volvo dealer told me that my front left shock is bad. (Why did he say nothing about upper spring seats?) I am just confused. The car seems to be OK, although it makes sqeaking noise when I pull to a stop. The tires seem wearing OK.

Thanks as always.
 

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For the A/C most likely you are low on freon.The compressor cycles when it is low on freon.

Do you have a check engine light on? There is a switch in the brake booster that goes bad.It is called a brake pedal sensor and it will stop the cruise from working.

Im not sure how many other places besides a Volvo specialist will know about and replace the upper spring seats. If the tech was new to the dealer he might not of known about the spring seats going bad and may have been guessing about the strut.

I would replace the spring seats and see if it still makes noise.
 
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