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Air Con active during startup, this is not normal?

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Air Con active during startup, this is not normal?

Post by darrylrobert » Tue Mar 10, 2020 3:13 am

Ive been using a diagnostic scan tool to to monitor exactly what my 2001 xc70 is doing mainly during start up and ive found the A/C compressor is active when the car is cranking and stays on for about 5seconds after starting. This cant be normal, there should be a delay after startup. Climate control is off A/C switch stays in off position, windscreen demist off, looked at compressor and is on. Anyone else notice this? or could it be because of this code (pic). This is the only fault code the car has a temperature sensor in the fan motor
Volvo 2001 xc70 fan temperature sensor

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Re: Air Con active during startup, this is not normal?

Post by abscate » Tue Mar 10, 2020 3:42 am

Thanks to jimmy the expert here on this firum, this knowledge is present here ,and , yes, this is by design.

This protects the compressor from pooled oil by dispersing it before loading the AC compressor fully,

It’s a P2 feature , I think it’s because of a change in the AC design from COTS To valve design.
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