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Air Con Turns Itself on Full Blast when starting Car 


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 Post subject: Air Con Turns Itself on Full Blast when starting Car
Posted: Mon Feb 01, 2016 8:42 pm 
Fordmods Newbie

Age: 29

Posts: 1

Joined: 1st Feb 2016

Ride: 2013 Falcon XR6 FG

Location: Melbourne
VIC, Australia

I've recently purchased a second hand 2013 XR6 FG from a dealer in Melbourne and every now and then when I start up the car the air con will turn itself on full blast, despite it not actually being on (if that makes sense).

I have to turn the air con on manually myself and then turn it off again to get it to stop.

This doesn't happen every single time I start the car, but it has happened probably 9 or 10 times in the month that I've had the car.

I've read up on some issues relating to batteries in the XR6 and apparently a battery on its "last legs" can potentially cause random faults with the air con, but before I go and fork out money for a new battery, I want to know if anyone else has had this similar issue and if so, how did you go about fixing it?

I should also note that this weekend just gone I received a 'System Comms Error' message which popped up randomly, but was gone when I started my car up 2 hours later, so I'm not sure if this is possibly related to the battery/air con issue.
 Post subject: Re: Air Con Turns Itself on Full Blast when starting Car
Posted: Thu Feb 04, 2016 8:02 pm 
Parts Gopher

Age: 62

Posts: 66

Joined: 4th Feb 2016

Location: australia
VIC, Australia

Do a load test on the battery, hook up a digital multimeter to the battery and crank it over when cold and see what the voltage drops to, If it is dropping below nine volts it may be as simple to much voltage drop at the bem.
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