Automotive a/c Pressure Readings Versus Vent Temperature

Your car's Ac system.

Good A/C Performance and Maintenance saves Money

Also much or too lilliputian refrigerant in your Air conditioning arrangement is a major crusade of A/C compressor failure and it tin also waste fuel.

The proper amount of refrigerant in the organization is very critical to A/C operation. Running the organization low on refrigerant causes compressor failure equally the system lubricant flows with the refrigerant. Low refrigerant flow means poor lubrication. If your A/C system works merely just doesn't seem cold plenty, it is a good thought to go it looked at sooner than subsequently.

Today'south air conditioning systems exercise not have a way to visually check the refrigerant level and the only accurate fashion to get the proper amount into the system is to recover the refrigerant, measure it and and so put the proper corporeality back in.

1 way to see how well your A/C organisation is performing is to measure the outlet temperature at the vent with an authentic thermometer with a probe that volition go into the vent. Drive the car with the A/C on max or recirculate. With temperatures well into the 80'south Fahrenheit, the outlet temperature should be around 35 to 45 degrees. This temperature should not change much when the engine is brought back to idle.

The outlet temperature tin can very depending on the car's system, the outside temperature and humidity. The A/C system needs to keep evaporator (the component that cools the air as it goes through it) from getting below 33 F as that would cause the evaporator to freeze upwards and not let air flow.

While this is a skillful test to meet if the A/C is functioning, information technology doesn't necessarily mean it is not low on charge. A system only half total of refrigerant tin yet cool well in the 70 - 75f degree range but be almost useless at 85 - 90f degrees. So if you do the test at 75 degrees it doesn't mean information technology volition piece of work properly at 80 or above.

Many times when the A/C system isn't working well, someone may add more refrigerant past just "guessing" by when information technology seems to exist working fine. It is easy to get as well much in at this time which causes higher pressures and heat, which causes mileage loss and eventual compressor failure.

Other things that can cause ac performance problems are non running in "recirculate" in hot weather, cooling fan problems, droppings in front of the radiator/condenser and heater command problems.
We recommend having the system evacuated and refilled every 3 - 4 years, every bit fifty-fifty a arrangement with no visible leakage may lose a little every year.

To see if your A/C system is performing, measure the outlet temperature at the vent with an accurate thermometer. Bulldoze the car with the A/C on "max". With temperatures in the seventy's to 80'due south Fahrenheit the outlet temperature should be around 35 to 48 degrees.

R134yf
Some cars made after 2014 use another refrigerant called R134yf, which is a constructed HFO refrigerant and a successor to R134a for automotive air-conditioning applications.

Its global warming potential (GWP) is ultra-low, with a rating of less than i. This means that one kilogram of R1234yf released to atmosphere has a significantly lower greenhouse effect than a kilogram of carbon dioxide. The price for this refrigerant is about v times more than R134 and requires special equipment to recharge and then it is important to keep information technology leak free.

R12

Air-conditioning systems earlier 1994 used a freon called R12 which was constitute to be harmful to the ozone. Nearly of these cars tin can be retrofitted to utilize R134. The correct manner to practice it is to remove and bleed the oil in the compressor, replace the accumulator or drier and flush the sometime oil out of the organisation every bit it is not compatible with R134a.

Y'all can simply replace the accumulator or drier, skip the flush and oil drain and recharge the system but efficiency may not be very expert. With irresolute to R134 you also need to refill the the system with R134 compatible oil likewise as the mineral oil used with R12 will not menstruation with R134 and will just pool in dissimilar areas and be useless.

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Source: https://www.waynesgarage.com/tips/more-tip/car_air_conditioning

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