AC Not Cooling Diagnosis
Also called AC not cooling checking
This is the starting point when cooling is weak or absent. Pressures are read on both sides, the compressor clutch and its electrical supply are checked, the fan and condenser are inspected, and cabin airflow and the filter are examined. The result is a clear cause and a quote for the fix. It is a diagnosis, so no gas is added and no part is replaced until you know what is actually wrong.
Signs you need this
- AC blows warm or only slightly cool air
- Cooling works sometimes and stops without warning
- Cooling is fine on the move but poor in traffic
- Compressor never switches on
- Engine temperature rises whenever the AC is used
Not all of these have to be present, and one of them on its own can mean something else entirely. That is what the diagnosis is for.
What the job includes
- High and low side pressure readings at idle and higher revs
- Compressor clutch engagement and electrical supply check
- Condenser cleanliness and cooling fan operation check
- Cabin filter and blower airflow inspection
- Vent temperature measurement with a thermometer
- Fault codes read on cars with climate control modules
How we do it
Listen and observe
We note when cooling fails, whether it changes with speed, and what has already been done to the system.
Read the pressures
Gauge readings on both sides show whether the charge, compressor or a restriction in the circuit is at fault.
Check electrics and airflow
Clutch supply, pressure switches, cooling fan, condenser cleanliness, cabin filter and blower output are all checked.
Give a clear answer
You receive the readings, the identified cause and a quote for the repair before any part is touched.
How we work
The same on every job, which is why we can write it down.
Diagnosis before quote
We find the fault first. A price given over the phone for a noise nobody has heard is a guess.
The price is agreed first
You approve the work and the cost before a spanner is picked up. Extra work means another call.
Parts you can check
We tell you whether a part is genuine, OEM, aftermarket or used, and what each one costs.
Old parts returned
Ask and we will hand back whatever we replaced. It is the simplest proof that the job was done.
Book ac not cooling diagnosis
Fill this in and a person will call you back to confirm the time and the price. Only your name and one way to reach you are required.
You send this
Takes a minute. No payment, no obligation.
We call you
To confirm the car, the time and the location.
Tell us the car and the symptom
We will arrange a mechanic at your location, or a slot at the nearest workshop. No payment until the price is agreed.