How to determine whether home air conditioning the refueling
Whether the air conditioning compressor oil shortage methods: Open heating mode, with transparent fluoridated transparent tube tube to see if there is a lot of oil, if oil is more, show no shortage of oil.
This or find air conditioning maintenance station to change, if this still need to use vacuum pump to add your air conditioning is not much, do not have to buy or find the air-conditioning maintenance department to more cost-effective. Air conditioning compressor cooling and lubrication are depend on the engine oil, add bad will spill, generally air conditioning is good frozen oil, don't come on, you see if filling holes of two nuts around grease stain and dirt, if there is no twist, if this is to do the vacuum degree, add air conditioning refrigeration oil. Good luck!
What do you mean add refrigerant? As long as the system does not leak, cooling/heating works well, there is no need to add, because the system is sealed, the refrigerant has no job losses. Unless the system pipeline corrosion, damage or corresponding part cause refrigerant leakage, just to add, but on the premise of repaired pipeline leakage.
