Car air conditioning not cold? Regas vs repair explained
Published 04 Nov 2026 by Carwooshh
Last reviewed: 4 November 2026
Car air con slowly loses refrigerant over time. If it's blowing warm, a regas may sort it — unless there's a leak.
Signs it needs attention: warm air, weak airflow, a musty smell, or windows slow to demist.
What a regas involves: removing the old refrigerant, checking for leaks, and refilling to the correct amount. Some garages add an antibacterial treatment.
Check the gas type: older cars typically use R134a, many newer cars use R1234yf, which usually costs more. Ask which your car needs when getting quotes.
If it goes warm again quickly, there's likely a leak — ask for a leak test before paying for another regas.
FAQ
- How often should car air con be regassed?
- There's no fixed rule; many cars benefit every couple of years or when it stops cooling well.
- Why is my car air con blowing warm?
- Low refrigerant, a leak, or a component fault.
- Is a regas the same as a repair?
- No. A regas refills the system; a repair fixes the cause of a leak or fault.