Why is my Vauxhall Vivaro's AC not working?

I've noticed that my AC has stopped working in my Vauxhall Vivaro. It used to work perfectly fine, but now it only blows out warm air. What could be the issue and how can I fix it?

It is possible that there is a leak in the AC system. Have a mechanic check for any leaks and repair them if necessary. It could also be a problem with the compressor or a clogged air filter. Any of these could cause the AC to stop working properly.

Another possibility is that the AC system may need to be recharged. Over time, the refrigerant in the system can become low and cause the AC to blow warm air. Ask a mechanic to check the refrigerant levels and recharge the system if needed.

If neither of these solutions work, it's possible that there is an issue with the AC control unit. Have a mechanic run diagnostic tests to determine if there is a problem with the control unit and replace it if necessary.