Volvo S90 recurring AC failure with frosted lines despite previous compressor replacement on Volvo S90

Some Volvo S90 owners report experiencing recurring AC failures with frosted lines, even after a compressor replacement. These issues are often linked to refrigerant leaks, which may stem from faulty O-ring seals, the condenser, evaporator core, or cracked hoses. Additionally, low refrigerant levels can contribute to AC problems, preventing the system from functioning optimally. Electrical issues are also a concern, as the AC compressor requires proper connections to operate effectively; testing the compressor by jumping it to the battery can help identify such problems. Furthermore, some owners have discovered leaking hoses, particularly the low side hose from the AC compressor to the charging block, indicating potential integrity issues. To address these recurring failures, it is crucial to inspect the AC system for leaks, ensure optimal refrigerant levels, verify compressor functionality, and consult with a professional mechanic or Volvo dealership for effective diagnosis and resolution.