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|Orifice Tube Color Code:||Blue|
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Q:WHICH O-TUBE SHOULD BE USED ON A RETROFITTED R-134A SYSTEM, RED OR BLUE
A:Both red and blue can be used on a retrofitted R-134A SYSTEM. The only difference the red is .062” and the blue is .067”.
Q:do you have to drain the system or what do you do
A:For further assistance, please provide the year, make, model and engine size of the vehicle.
Q:Is the tube directional? If so, which way is it oriented? Also, How does one know if a red or blue is required?
A:It is inside the tube usually near the firewall. The difference is the red (ford) is .062” and the blue (ford) is .067”.
Q:why red or blue
A:blue is used if you have rear a/c red is used for units w/o rear a/c
A:The difference is the red (ford) is .062in and the blue (ford) is .067in.
Q:Where does this Orifice Tube belong?
A:The orifice tube, probably the most commonly used, can be found in most GM and Ford models. It is located in the inlet tube of the evaporator, or in the liquid line, somewhere between the outlet of the condenser and the inlet of the evaporator. This point can be found in a properly functioning system by locating the area between the outlet of the condenser and the inlet of the evaporator that suddenly makes the change from hot to cold. You should then see small dimples placed in the line that keep the orifice tube from moving. Most of the orifice tubes in use today measure approximately three inches in length and consist of a small brass tube, surrounded by plastic, and covered with a filter screen at each end.
A:It is inside the tube usally near the firewall