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MK1 AC, cold on startup but not after stopping engine


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Got a Ka MK1 1.3. 

The AC will blow consistently cold upon a cold engine start up and will do this for an entire journey.

If, however, I stop the car, switch off and then back on again it will only blow very hot. 

I know about the heater control valve issue with these but can't understand why it would make a difference if the car stopped running then was restarted...

Any ideas anyone?


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  • 1 month later...

The car stops hot and the evaporator is cold . Then it will not blow cold air. The pump clutch comes in with a smack? If so, there is SOME pressure in the system. I would suspect a droplet of water blocking the orifice and would change the drier and recharge the system.

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