Why Isn’t My Car’s Air Con Cold – and Is It Worth Fixing?
- PW Auto Repairs
- 4 days ago
- 2 min read
We often get asked questions like:
“Why is my car AC not blowing cold air?”
“How do I know if my AC is working?”
“Does my car air con need re-gassing?”
Here’s what you need to know:
What is AC in a Car?
The air conditioning system in your car does more than just cool the air – it helps reduce humidity and can even be used to demist windows in the winter. It works by compressing and circulating refrigerant gas through a closed system of components (compressor, condenser, evaporator and more) to provide cooled air into the cabin.
Common Car AC Problems
Some of the most common faults we see include:
Low refrigerant gas – often just needs a simple re-gas (but we always test for leaks first)
Faulty compressor – this part can wear out or seize over time
Blocked cabin filter – restricting airflow, even if the system itself is fine
Electrical issues – a faulty switch, sensor, or wiring problem can stop it working
Leaking condenser – especially common after winter when salt and grit corrode the system
How Do I Know If My AC Needs Fixing?
Signs your car’s AC might need attention include:
It’s blowing warm or weak air, even on full power
You can hear strange noises when it’s running
There’s a musty smell when it’s on
The windows are misting up more than usual
A quick inspection can usually confirm what’s going on.
How Much Does Car Air Conditioning Cost to Fix?
Costs depend on the fault:
Re-gas: Usually from £60–£130 depending on gas type (R134a vs R1234yf)
Nitrogen AC Leak Test: Usually £20–£40 on top
Compressor, condenser or evaporator: These can range from £200–£600+ fitted
Pipes & Seals: The AC systems in vehicles have many connected components which can be damaged or wear over time.
We'll always give you a transparent estimate before doing any work.
Is It Worth Fixing the AC in a Car?
In short – yes, in most cases it is. Whether you use it for summer comfort or winter demisting, your air con plays a bigger role than many realise. Leaving it broken can lead to further system damage and higher repair bills later down the line. It also helps when you come to sell the vehicle - some buyers will turn the AC on to test it works.
How Often Should I Recharge My Car’s AC?
Most manufacturers recommend recharging the air con gas every 2 to 3 years, but it’s a good idea to get it checked annually, especially before summer.
Final Thoughts
If your car’s air con isn’t doing what it should, don’t ignore it – a quick visit to the garage could save you money and keep you cool when you need it most.
Need help with your AC? We're happy to help - just give us a call or book online!
01636 550852
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