Honda City T9A radiator-fan, cooling-coil and compressor leak checks

Sifu White explains what happened

Prices, repair times and warranty terms mentioned in the video applied at the time. Ask the workshop about current arrangements.

Look at the gauge; the refrigerant charge is empty. Today we are discussing the Honda City T9A, around the 2014 model year. One of the first items to inspect is the radiator fan because it commonly fails. When the fan is faulty, the air-conditioning may be warm while stationary but become cold when moving, and refrigerant pressure can become excessive.

The cooling coil also commonly leaks. The customer says the air-conditioning stopped cooling completely two or three days earlier and then came to Sifu White. The gauge shows an entirely empty charge. From experience, losing the full charge that quickly indicates a significant leak. Initial inspection also shows a small leak at the compressor.

The compressor leak appears small, so the major leak may be at the cooling coil and requires further inspection. If the condenser is neither contaminated nor damaged, it may remain usable after the system is correctly serviced. The receiver drier, expansion valve and cabin air filter should also be assessed; a dirty cabin filter normally needs replacement.

Why cooling after a regas does not prove a repair

Refrigerant circulates through a closed circuit; it is not fuel that the engine consumes. If cooling returns after charging and then deteriorates, the investigation should establish whether there is a leak, whether the previous charge matched the specification, and whether another control or heat-rejection problem is present. The initial return of cold air describes performance at that moment. It does not show that a leaking component has been repaired.

A model’s familiar failure pattern is a starting point, not proof. The condenser, connections, hoses, compressor seals and evaporator inside the cabin are different possible inspection locations. An oil stain can guide a leak test, but it is not a substitute for confirmation. Finding one leak also does not clear every other part of the circuit. After repair, the sealing and cooling performance need to be checked again under conditions relevant to the original complaint.

Why hot weather or idling can reveal a cooling problem

Air-conditioning has to move cabin heat outside. Hot weather and sun-heated seats and trim increase the cooling load, while airflow through the condenser affects heat rejection. Airflow conditions change between driving and standing still. “Warm at idle, colder while moving” is therefore a useful clue, but it does not prove a fan failure without testing the fan, refrigerant circuit and relevant operating conditions.

Assessment can include condenser and radiator condition, fan operation, engine-cooling data and refrigerant specification. Some vehicles change A/C operation when engine or other protection conditions are active. Vent temperature also depends on ambient conditions, humidity, recirculation and fan speed. A reading from one video is not a universal pass mark for every car. Meaningful before-and-after comparisons should record comparable test conditions.

The next check is still pending

The video ends before the final repair is confirmed. The remaining checks will determine what needs to be repaired or replaced.

What to tell the workshop about your own car

You do not need to guess a part name first. A clear description of what actually happens is often more useful for reproducing the complaint than requesting a particular replacement.

• Record the last regas date and how long cooling lasted.
• Compare idling, driving, midday and evening behaviour.
• Include the model, year, recent repairs and what changed before or after the symptom began.