Do NOT pressurise the system as the condensers are manufactured from thin wall material and are rated up to a certain psi/bar pressure. I am pretty much ready to bolt in the "new" compressor and condenser and dryer, with the plan to get the system leak tested and regassed shortly after. If you think the 'new' compressor is pretty empty then, if it were me, I would put half the total amount in and cross my fingers.

Most if not all OEM compressors will come pre-filled with oil, but it is up to the person installing the compressor to check that the correct amount of oil is in the compressor. The most commonly used gas to recharge your air con system is R-1234yf refrigerant gas, and that’s exactly what we sell at Halfords. It has the required miscibility characteristics along with unparalleled chemical and thermal stability which enables the use of this product over a wide operating temperature range. Choosing the wrong compressor oil for your car can result in improper lubrication, causing more damage to your vehicle’s A/C system. Hello, As a recently retired refrigeration and A/C engineer there will be certain criteria you will need to follow to ensure a good result.

Our experts can check that your air con is working properly, and help you resolve any issues quickly. We offer the world's widest, deepest range of motor and gear oils, fuel and oil additives, care products, chemical problem-solvers and service products.

Scroll through this page and find out about the different variants of refrigerant and compressor oils. The oil is extremely hygroscopic, conductive and is available in three viscosities, Pag 46, Pag 100 and Pag 150.

If refilling yourself, remember to alternate between holding the bottle horizontal and vertical nozzle down to make sure you get a good mix of oil to refrigerant. One thing I’ve always been interested in “hacking” - the aircon won’t run below 5C ambient temp, which has always felt a little high to me as misting and condensation in cold weather are a pain, especially in the winter months here in the UK. As a starter you will need to ensure you have a clean system, usually we used Nitrogen to blast through any rubbish and old oil from the system. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average.