The Air Con on my 03 Laguna fails to work at speeds over 50mph.?

Local garage has allegedly re-gassed but there is no difference. It works fine at low speeds, although the higher of the two settings does not seem to make any difference to temperature. When car was new there was a distinctive temperature difference between low and high settings.

Answers:
If you told garage about the problem
Then they said it was because it needed re-gassing,
Then take it back to them to sort it out as they have not solved the problem
By doing what they did.

Other options If you told garage about the problem did,
WYou think the work was not done or similar,
You can go to trading standards
They will look at it and check if work was done.
Then sort the garage out.
Or You could go to Citizens Advice talk to them see what they say
Open your windows then like the rest of us!!
Sounds like it will have to be taken to your Renault Stealership.


Last time I was at my local dealers there was a que of people complaining about spurious problems on their Renaults

I'm not an air con expert but it does sound like there is some sort of sensor issue
I don't know if this will help you but vehicles now have a fuel saving function that stops the AC compressor when the engine is "working hard". Theoretically this should be engaged only under conditions of hard acceleration. Normally you never notice that the compressor is shut down for a few minutes because of residual cooling in the lines.

Originally here was a separate device that did that. By '03 I would think it is all programmed into the computer. Could running at 50 mph mean hard acceleration? It shouldn't but??

Also, does your reference to Low and High settings mean Low= "use outside air" and High= "use inside air"? An AC takes in air and lowers its temperature by only 2-3 degrees. If the outside air is cooler than the inside air, use the "low" setting so you are starting with cooler air. Once the inside air is cooler than the outside air, switch to "High". Since you can't sense any difference, maybe the "flapper" door that selects the "inside vs outside" air isn't functioning.
Hope this helps.

PeteC
Sounds like you have a sensor problem, but then renault are not the best of motors yet can be the costly ones when problems start.

Go back to the garage you had it re-gassed from is the best solution after all they are the experts eh!

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