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Air con compressor staying on

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Old 25-05-2011, 03:10 PM
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liam delaney
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Default Air con compressor staying on

Hi i have a 03 Mondeo 2.0 tdci every time i start car up the air con compresser kicks in even if a/c is switched off. I have removed fuse to stop also engine rad fan comes on when you start up car. Has any one come across this before ???

Also i have just replaced all four injectors and had a problem coding them in. Had to code them in firing order before they would code in and knock off the check engine light ( glow plug heater light )
Old 25-05-2011, 03:12 PM
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StephTell
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I'm assuming it has an electromagnetic clutch?

In that case: sometimes when it isn't shimmed properly it can engage when hot and refuse to let go again lol

It should disengage when you remove the relay though, or remove the pressure sensor.
Last one is easier to acces most likely.
Old 25-05-2011, 03:24 PM
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DanW@FastFord
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What did you use to recode them? Is yours a Euro 3 or Euro 4 engine? There aren't many handsets that can recode Euro 4s, and even Euro 3s are tricky to do properly.
Old 25-05-2011, 03:35 PM
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PAUL S
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You probably know this but just in case, on my focus (I assume same on the mondeo), if you have the heater dial set to the windscreen only setting the a/c works even if switched off, in order to clear the screen quicker so you may have a problem with the dial and its registering as being on the screen setting all the time hence the compressor kicking in.
Old 25-05-2011, 03:57 PM
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liam delaney
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The guy used a snap on hand held computer . Dont know if it has a euro 3 or 4 engine.
Old 25-05-2011, 03:58 PM
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liam delaney
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any idea were relay or pressure sensor is ????? What do you think about the rad fan should it come on as soon as you start engine
Old 25-05-2011, 04:08 PM
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liam delaney
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Did not know that cheers. Have just tried it on a diff setting and comp still kicks in but thanks anyway

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Old 25-05-2011, 05:45 PM
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The most obvious difference is the EGR valve which is non electrical on the Euro 3, and has electrical connections on the Euro 4.

This is a 3...

Are there any fault codes?
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