How to fix a faulty air conditioning system in a Vauxhall Insignia?

My Vauxhall Insignia's air conditioning system is not working properly. It only blows hot air even when the temperature is set to low. What could be the cause of this issue and how can I fix it?

One possible cause of a faulty air conditioning system in a Vauxhall Insignia could be a low refrigerant level. This can be checked by a mechanic and refilled if necessary.

Another common issue with air conditioning systems is a faulty compressor. This can be expensive to replace, so it's important to have a professional diagnose and fix the issue.

Check if the air filters are clogged or dirty, as this can also affect the performance of the air conditioning system. Cleaning or replacing the filters may solve the problem.

If none of the above solutions work, it could be a problem with the electrical wiring of the air conditioning system. This should only be fixed by a certified mechanic to avoid any safety hazards.