Nissan Almera cooling-coil leak repaired within a customer's three-hour challenge

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.

Sifu, I have seen that you are well known on TikTok, but I care about the actual repair. My car air-conditioning is not cold and I do not know what is wrong. I am challenging you to solve it within three hours. We will connect the gauges and equipment, then check the refrigerant and diagnose the fault. The refrigerant level is very low.

We expect to complete it within three hours. The main suspect is a leaking cooling coil, so the dashboard has to be opened for inspection. The job is finished in under three hours and the air-conditioning is cold again. The fault was a leaking cooling coil, which we replaced.

The pressure readings are now good and the compressor has no problem. We replaced only the cooling coil, cabin air filter and expansion valve, and the air-conditioning is operating properly again.

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 access and reassembly matter to the result

The evaporator usually sits inside the cabin HVAC housing. Access depends on the model, year and housing design. Some vehicles require dashboard removal; others provide a side-access route. Fewer dismantling steps are not automatically better, and more dismantling is not automatically necessary. What matters is whether the component can be reached correctly and whether clips, fasteners, wiring and seals can all be restored as intended.

Foam and duct seals keep air travelling through the intended paths. A damaged housing, missing fasteners or displaced seal can leave air leaks, noises or uneven delivery. The repair plan should therefore cover reassembly checks as well as the price of the replacement coil. Marks from earlier work may be useful clues, but glue or cracks alone do not establish who caused the damage or exactly how it happened.

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.
• Ask about access, seals, fasteners and the functions checked after reassembly.
• Include the model, year, recent repairs and what changed before or after the symptom began.