![]() ![]() The type of refrigerant used in the car and the quantity is indicated in a sticker stuck on the engine bay or on the hood. R-134a refrigerant can - 450g (costs Rs 430 for a can sufficient for a hatchback).Probe thermometer or the one in your digital multimeter (DMM) if you have the option.But at this stage, I do not know if there are any leaks in the system. Over all these years, I have never had an AC refrigerant recharge. But if the car is over 6-8 years old and the AC’s cooling effect has reduced over time, there’s a good chance this is due to the lack of refrigerant in the system as it turned out to be in my case. Sometimes, gas leaks out from the Schrader valves present in the charging ports of the car in extremely minor quantities. If there is a puncture in the metal tubes or hoses, or the condenser coil due to a nasty stone hit, the refrigerant would again leak out. Despite being completely sealed systems, refrigerant levels drop over time as the rubber seals/o-rings in the connectors of the rubber hoses and metal tubes wear out and causes the refrigerant to gradually leak out over time. The lack of refrigerant in the system can result in ineffective cooling. The last thing left to check was the refrigerant in the system. It was changed during the last service 5 months back and the recirculation mode is set to ON at all times so the car doesn’t draw fresh air from outside and therefore does not contaminate the filter quickly. Dust and pollen filter - relatively clean.Spins at different speeds depending on the setting so the blower resistor had no complaints either. The expansion valve is installed outside the firewall/plenum chamber bulkhead. Expansion valve - assumed to be working fine. ![]() I use the compressed air from these service centres and garages to clean the fins. The fins were not clogged or dirtier than usual. Condenser - assumed to be working fine. ![]() No visible frosting observed when viewed from the cabin air filter cavity. I did not see any water collected in the footwell or a clogged drain outlet.
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