Old Feb 5, 2016 | 10:36 AM
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Ak47mh
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Joined: Oct 2015
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From: Cardiff
Default ST170 Aircon engine cooling fan draining battery

Hi guys

Really hoping you can help me.

I drove our Focus back from the tyre shop yesterday and parked up no problem. When I then went back out roughly an hour later I could hear the engine fans on which I thought was strange. I then noticed I couldn't unlock the car with the remote key and found the battery was dead. I then disconnected the battery to stop it and since reconnecting it, I found the relay/fuse F6 Aircon engine cooling stops the fans blowing if I remove it. I tried to replace it with another 30amp fuse from the box, but it still continued.

Now the aircon is off in the car and actually has not worked for a few years. It might have been on the windscreen dial though (which I understands turns on the aircon even though the AC light is off). Yet I have now turned the heater dial to 0 so it is off, but the engine fans come on straight away as soon as I replace the relay F6 with the engine completely off.

1.) Has anyone come across this before and know where the issue is?

2.) Can I leave the relay/fuse F6 completely disconnected and then jump start the car to drive it? Ie does the fuse only control the aircon which I will leave OFF or is it not that simple and I will risk the car overheating or worse?

Much appreciated for any advice or tips?

Cheers,
Ant
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