When to discuss this option
- A professional assessment considers a limited charge correction suitable for the particular vehicle.
- You need to understand whether an earlier partial addition left the system's charge uncertain.
Important limitations
Adding refrigerant without establishing the existing quantity can overcharge the system. Pressure and vent temperature do not always reveal the exact charge, and a low charge can indicate a leak. When the amount or refrigerant identity is uncertain, recovery and a measured recharge may be more appropriate than topping off.
What should be established first
The refrigerant type, system condition, and reason for low performance are reviewed. The proposed procedure should explain how the required charge will be controlled and whether leakage needs investigation. No additive can substitute for repairing a confirmed mechanical leak. Final checks should assess operation rather than assuming an addition has solved the underlying problem.
Before requesting service
Tell D&S exactly what was added previously, including any product containing sealant. Ask whether top-off or complete recharge is the sounder approach for your vehicle. Do not keep adding refrigerant whenever cooling fades; repeated loss deserves diagnosis and appropriate refrigerant handling.