My car AC compressor has blown 15 minutes after a regas/recharge. What could be the cause?
Vehicle ac evacuation and recharge near me
Before replacing any components that carry refrigerant through the system, the existing refrigerant must be removed. On a typical 80° F Day, a fully charged system will have over 80 psi of pressure. Opening a fitting or union will allow the refrigerant to escape into the atmosphere. Such a procedure I not only extremely unsafe; it is illegal and environmentally harmful.
How much does it cost to evacuate and recharge AC?
The cost of evacuation and air conditioning system recharge will depend on the type of refrigerant your system has installed, and the amount required to get it fully charged according to manufacturer specifications.
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Do you have to evacuate AC system before recharging?
After repairs have been performed on the A/C system, or any time a system has been opened, it must be evacuated. Air and moisture will enter an open system. Moisture from humidity in the air can form destructive chemicals inside the system when mixed with refrigerant and oil, and can cause a breakdown of the newer synthetic oils used in R 134A systems.
Also water in the system can ice up in the expansion valve and block the refrigerant flow. These chemicals can corrode metals and attack rubber parts.
During evacuation, as the pressure inside the system lowers, so does the boiling point of the water in the system. Water can vaporize and be withdrawn by the vacuum pump.
How do you evacuate an AC system on a car?
You can use either a charging station or stand-alone vacuum pump. According to EPA ,when evacuating a vapor compression system, the vacuum pump should be capable of pulling 500 microns (29.92 hg.) of vacuum. After properly connecting the service hoses and removing any refrigerant , start the vacuum pump and open both sides of the system, exposing it to vacuum. Once the vacuum level reaches specification, continue pulling the vacuum between 5-60 mins depending on the type of system repair and the time the ac system has been opened. Close all valves and turn the vacuum pump off. Wait for 1-15 minutes and note any loss of vacuum using your ac manifold gauges. If vacuum is lost, it means system leakage is present.
If the vacuum pump is turned off too soon, some of the moisture in the system will be left behind. Before turning off the pump, close off the A/C system to the atmosphere to prevent air from being drawn back in.
Where can I find a professional auto air conditioning service?
We specialize on automotive air conditioning systems. We have ASE certified auto ac mechanics near you.