Aircon switching off on its own

[Ian2015]

On a journey yesterday the aircon button light kept going off on its own and the function stopped. Each time I turned it back on after 10 minutes or so off it went and only ambient air. Could it just need regassing or more likely something more serious. Any ideas please?

[ColinBarber]

Possibly just low on pressure. Best to get the diagnostic code(s) read to know for sure.  

[DavidCM]

Have you inadvertently set it on "auto" so that when it reaches the set temperature,it goes off?

[Scotlex]

6 minutes ago, DavidCM said:

Have you inadvertently set it on "auto" so that when it reaches the set temperature,it goes off?

That is what I was thinking...

[Ian2015]

Thanks to Colin, David and Scotlex. Yes I will have to get a diagnostic check. I keep the aircon on auto permanently. When it reaches the set temperature it used to maintain it and the on/off switch stays illuminated all the time. Now it goes out around half hour after driving (having a reasonable attempt at cooling) then with little cooling until manually switched back on.. Then it goes out again after 10 mins or so with no cooling and so on. Hopefully it just needs gas.