What Does a Full Air Con Service Actually Involve?

“Air con service” gets used loosely — sometimes it means a full check-up, sometimes it just means a regas with a different name on the invoice. Here’s what a proper full service actually covers, step by step.

1. Compressor operation check

The compressor is the heart of the system, pressurising refrigerant so it can absorb and release heat. We check it engages properly, runs smoothly, and isn’t making noise that suggests worn internals. A failing compressor is one of the more expensive faults, so catching early warning signs matters.

2. Condenser condition check

Mounted at the front of the car, the condenser is what actually sheds heat from the system — and it’s directly in the firing line for road debris, stone chips and general grime. A blocked or damaged condenser makes the whole system work harder for a worse result.

3. High and low side pressure test

We connect gauges to both sides of the system and check the pressures against the expected range for your vehicle and the outside temperature. This tells us a lot in a couple of minutes: low pressure points to a leak or undercharge, unusually high pressure can point to a blockage or airflow issue at the condenser.

4. Cabin (pollen) filter inspection

Often skipped elsewhere, but it’s a two-minute check with a real impact on airflow and cabin air quality. If it’s clogged, we’ll recommend replacing it — see our pollen and cabin filter service for details.

5. Regas, if the levels need it

If the pressure test shows refrigerant is low, we recover what’s left, vacuum the system, and recharge it to the correct spec — the same process as our standalone regas and recharge service, just bundled in as part of the full check.

6. Written efficiency report

You get a plain-English summary of what we found, what (if anything) needed doing, and anything worth keeping an eye on before your next service.

Who this is for

A full service makes the most sense if it’s been a while since anything was checked, you’ve noticed a general dip in performance rather than one obvious symptom, or you’re buying a used car and want to know what you’re inheriting. If you’ve got one specific, obvious symptom — no cold air, a bad smell, a leak — you can usually go straight to the relevant service instead. Not sure which applies? Get in touch and we’ll point you the right way.