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Under the Hood & HVAC / Re: Need help finding replacement A/C hose from compressor to condenser
« Last post by MIPS on May 12, 2024, 08:44:40 PM »Pulling it to vacuum removes moisture from the system, plus most refrigerants don't like being "contaminated" with normal air because the loop (and the TXV and the high/low pressure switches) relies on the pressure of whatever refrigerant it was designed for and air is well, air. It's inert for refrigeration purposes.