A/C Fill Freon Fill Amount (2024)

FAQs

A/C Fill Freon Fill Amount? ›

If your unit is low on refrigerant, you will need 2-4 lbs. per ton of AC cooling to refill the refrigerant to optimum levels. Most houses have air conditioning units that range between a half-ton to 5 tons. This means a home with a 3-ton air conditioner will need 6-12 lbs.

According to PG&E, most central air conditioning systems use two to four pounds of refrigerant per ton of cooling capacity. A three-ton air conditioner would typically have six to 12 pounds of refrigerant for a proper charge.

Expect to pay around $300 on average, or between $200 and $500* to add freon to your AC unit. Part of understanding air conditioning (AC) costs is understanding how refrigerant works. Freon is a refrigerant brand, but it's become a generic name for the important substance your AC uses to cool your home.

All Classic Auto Air “Smart Series” and “Daily Driver” A/C systems use exactly 24oz. of R134a. When can charging most common can sizes are 12oz. each, be certain to check the can sizes before charging.

You must check the owner's manual before adding more oil. The AC system in most modern vehicles needs a total of 4 ounces (120 ml) of oil.

Miscalculating the amount of refrigerant you need and supplying too much can cause the unit to experience increased pressure, blockages, and malfunctions. Having a professional calculate and fill your refrigerant as necessary provides the best way to prevent overfilling and overcharging.

Most cars hold between 28 and 32 ounces of refrigerant (or about 2—3 12oz cans), however larger vehicles and those with rear A/C will likely hold more. Check your vehicle manual for the system capacity for your specific vehicle.

Having too much refrigerant in your AC can damage the compressor. This can happen because the excess refrigerant will likely collect inside the compressor and cause subcooling, wherein temperatures are below normal. Furthermore, the extra refrigerant can flood the compressor and damage its mechanical parts.

Option 1 0.8 x 14 kg = 11.2 kg Option 2 0.7 x 14.3 litres = 10.01 litres. The density of R134a at 30OC is 1.19 kg / litre, so the safe fill weight is: 10.01 x 1.19 = 11.9 kg. Option 1 gives the lowest value so this is the safe fill weight which should be used.

There are three options to determine the capacity: Read the nameplate—It can be very hard but start here: • Remove all refrigerant and recharge into system. Estimate charge based on tonnage/size. Refrigerant charge as this chart shows vary by type these are examples of common refrigerants.

What happens if you put too much oil in your air conditioner system? ›

Excess oil may accumulate in the evaporator and then return to the compressor in a slug. This could overfill the crankcase and possibly damage the compressor. Excessive amounts of oil in an evaporator decrease the capacity of a system.

Vacuuming only removes gases, not liquids. Oil doesn't change state to gas, it stays liquid and therefore it will not get sucked out.

Leaving refrigerant levels low can also cause damage to the compressor which can be costly to replace. If you suspect your AC may be low on refrigerant, you should have it checked by a professional as soon as possible.

Forty PSI is fine.

per ton of AC cooling to refill the refrigerant to optimum levels. Most houses have air conditioning units that range between a half-ton to 5 tons. This means a home with a 3-ton air conditioner will need 6-12 lbs. of Freon.