Where is the low pressure valve located?

Where is the low pressure valve located?

The low side service valve is located in the line that runs from the compressor through the evaporator (firewall) and up to the condensor on the low pressure (suction) side of the system.

How much freon does a 2003 Lincoln Navigator take?


Year Model Refrigerant
1988 All Engines 40.00
2003-2004 All Engines w/ Front & Rear AC … 54.00

Why is my high side pressure low?

The reason you have a high pressure side and a low pressure side at all is because the compressor increases the pressure and as it runs through your AC system to the condenser where it changes from a gas to a liquid and it will eventually lose pressure again as the cooling process takes place.

What color is the low side of an AC system?

Red hose goes to the high pressure side, blue goes to the low pressure side and yellow hooks to Freon source, can, etc.

Do you charge AC on high or low side?

Every auto air conditioning system has two service ports: one on the high pressure and one on the low pressure side. When recharging with AC Avalanche refrigerant, for safety, you will charge through the low side service port. Never charge through the high side port.

What is the low side of an AC system?

The low side, or suction line, will be the line connected to the compressor from the top or higher position. It will be cold to the touch and may be wrapped with insulation. This is where freon enters the compressor as a gas.

Is R12 Freon?

It became known as R12 or Freon. In fact, R12 was used for many years as a propellant in a variety of aerosol products and sprayed directly into the air, and it is closely related to the halon used in fire extinguishers.

How much R134a does my car need?

One can of R-134a typically holds 12 oz. of refrigerant. While the standard auto air conditioning system needs about three pounds of liquid Freon, the amount does vary, so check with your manufacturer or have your mechanic check.

What is in Freon?

In addition to fluorine and carbon, Freons often contain hydrogen, chlorine, or bromine. Thus, Freons are types of chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), and related compounds. The name Freon is a trademark registered by E.I. du Pont de Nemours & Company.