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Air Conditioning

Preventing Air Conditioning System Failures II

  • Always replace the receiver/drier or accumulator whenever system is open for repairs.
  • Always use the proper drier for your refrigerant. (XH-5 -- R12 only; XH-7 -- R12 or R134a; XH-9 -- R12, R134a, and other refrigerants)
  • Always use Ester Oil with R134a systems.
  • Always add two (2) ounces of oil to an ACCUMULATOR when replaced.
  • Always add one (1) ounce of oil to a RECEIVER/DRIER when replaced.
  • Always check the amount of oil in a new compressor prior to installation.
  • Always check condenser fan and interior fan for proper functioning.
  • Always check for proper voltage to clutch. (Low voltage can cause slipping which can lead to failure of compressor due to heat buildup.)
  • Always rotate compressor gently by hand five or six times before installation. (This reduces the risk of liquid oil damaging valves.)
  • Always cap the system when a component is removed. (Ester oils absorb water at an incredible rate and capping system reduces chances of contamination.)
  • Always check o-rings for swelling or disfigurement. (Swollen o-rings are good indicator of contamination.)
  • Always purchase oil in single-serving containers. (This ensures the integrity of the oil has not been compromised by the absorption of water or other contaminants.)
  • Always find the cause of an A/C system failure. (Very few compressors actually "go bad" - a failed compressor is typically the result of some other system problem. The primary cause of all compressor failures is lubricant associated.)

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