![]() Step 5: Install any parts removed to gain access. Repeat the same procedure on the other end of the AC line with care taken with the o-ring on this side as well. The AC line nut can now be installed and tightened on this end. Make sure the o-ring does not become pinched during assembly. It should go smoothly and be installed straight. ![]() Begin with one end and place it into the fitting. Lubricate the new o-ring before they are installed using an approved lubricant such as AC oil. If your AC line did not come equipped with a new o-ring, install it now. Others the o-ring must be purchased separately. Some new AC lines may come with o-rings installed. If you are unable to locate the old o-rings, make sure both fittings are clear before proceeding. If you do not see an o-ring, then it may still be in the other end of the fitting. Before the new line is installed, take a look at the old ac line. ![]() Repeat the procedure on the other end of the AC line and set the AC line aside. The AC line then is able to pull out of the fitting. In this style, the nut will be loosened and removed. The most common are the threaded block with an o-ring fitting on one end as shown above. There are a variety of different styles of line and each has its own method of removal. Put on your eye protection to ensure any refrigerant in the system does not get into your eyes when the line is disconnected.īegin by disconnecting the first end of the AC line to be replaced. ![]() Remove any parts needed to be able to work on the AC line. If this is the case, now will be the time to remove these parts. In some cases, components must be removed to gain access to the AC line. Note if the line is leaking and where it was leaking from if so. Make sure it matches the new line you have before any repairs begin. Locate both ends for the line that will be replaced. The gauges for the high and low side should both read at least zero before the process is completed. Follow the steps for the individual machine. Turn on the AC recovery machine and follow its prompts for the procedure for that machine If not already done, hook the recovery machine’s yellow line up to an approved recovery tank.ĭo not begin the process yet. The blue line will go to the low side port while the red line will attach to the high side port. Part 1 of 3: Recovery of the old refrigerant If you are not certified or do not have the the tools, then the recovery, vacuum, and recharging are best left to the professionals. Specialized machines are used when recovering refrigerant. Warning: The EPA requires individuals or professions that handle refrigerant to to have a Section 608 License or a universal refrigerant handler’s license.There are high and low pressure lines and the replacement procedure for either will be the same. This article only covers replacing the AC hose after it has been diagnosed as the cause of the air not blowing cold or a leak. Many different reasons can be the cause of why the AC system to not blow cold air. The AC lines can fail over time, though and can leak or fail internally requiring replacement. They connect all the pieces together and help to carry both gas and liquid refrigerant through the system. The AC lines are one of the most important components in the AC system.
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