The short answer is no, you should not replace 1234YF refrigerant with R134a in a car's air conditioning system. Doing so can lead to significant issues and damage the air conditioning compressor.
Here's why:
Refrigerant Compatibility: 1234YF (HFO-1234yf) and R134a (HFC-134a) are different types of refrigerants with distinct chemical properties. Car manufacturers have been transitioning to 1234YF in newer vehicle models due to its lower global warming potential (GWP) compared to R134a. Using the wrong refrigerant can cause inefficiencies and potentially harm the air conditioning system.
System Design: Car air conditioning systems are designed to work with specific refrigerants. They are calibrated to handle the pressure and properties of the designated refrigerant. Introducing the wrong refrigerant can disrupt the system's balance and lead to performance issues.
Compressor Damage: The compressor is a critical component of the air conditioning system. When using the wrong refrigerant, the compressor may not be lubricated correctly, leading to increased friction, wear, and potential damage. This can result in compressor failure, which is a costly repair.
Safety Concerns: Refrigerants can react differently when exposed to various conditions. Mixing refrigerants or using the wrong one may lead to leaks, and in extreme cases, it can even cause safety hazards, such as the release of toxic gases or fire risks.
If your car is designed to use 1234YF refrigerant, it's crucial to stick with that refrigerant when recharging or servicing the air conditioning system. Likewise, if your car uses R134a, do not attempt to replace it with 1234YF.
If you suspect there is an issue with your car's air conditioning system or refrigerant, it's best to consult a certified automotive technician or professional who can properly diagnose and address the problem using the correct refrigerant and following the manufacturer's guidelines. Always prioritize safety and follow the manufacturer's recommendations to maintain the efficiency and longevity of your vehicle's air conditioning system.