Stoppage in the air conditioner system’s refrigerant circuit (Worksheet 7)

Dirt or twisting causes a stoppage in the refrigerant circuit.

  1. Locating the stoppage by looking for an abnormal temperature change along the refrigerant circuit (warm on front of the stoppage, cold after the stoppage).
  2. Draining the refrigerant from the air conditioning system.
  3. Replacing the clogged component.
  4. Checking the refrigerant circuit regarding several dirt accumulations.
  5. Removal of the non-condensible gas in the air conditioning system, which means that the vacuum pump is kept running for at least 30 minutes. Important: check the degree of evacuation!
  6. New filling of the air conditioning system with the recommended refrigerant. The amount of oil sucked out must be replenished again (refer to the assembly instructions or the table of refrigerant quantities).

Did you know …

… that you should never recycle a pressureless air-conditioner, but always test it with nitrogen before filling?

Professional standard

ASC by WAECO is, and has been for years, the abbreviation for excellent quality and cutting-edge technology in A/C service equipment. The series is constantly improved and complemented to meet future requirements. All ASC service units are state of the art and fully automatic

Be a successfull A/C professional

Use our comprehensive range of equipment for service and repairs on automotive A/C systems to make your company an efficient and successful A/C workshop. Polar bear Eddie supports you with useful information and advertising material that will keep you an Eddie nose length ahead of your competitors!


Dometic UK Ltd.
Dometic House, The Brewery,
Blandford St. Mary
Dorset DT11 9LS

Tel +44 (0) 344 626 0135
Fax +44 (0) 344 626 0143