How To Install a Service Port On Sealed System Window Air Conditioner

By | July 2, 2016

How To Install a Service Port On Sealed System Window Air Conditioner
Window air conditioners are usually not fixed when broken and most often tossed and replaced.
 
However they are fixable, often only needing a low-cost part or a refrigerant recharge to get them working again.
 
Most window A/C units do not come with a service port Schrader valve and need one to be installed.
 
This is a easy process which only needs a piercing valve kit.
 
You can also solder on a valve but it is not necessary and comes down to personal preference.
 




 
Items needed
Wire brush or emery cloth to clean the area.
A Bullet Piercing Valve.
 
Bullet Piercing Valves can be bought at most air conditioning part supply stores or online.
 
Bullet Piercing Valve on Amazon
Supco BPV21 Bullet Piercing Valve

 
Steps to Install a Service Port on a Window Air Conditioner

  1. The first step is to find a spot on the copper refrigerant line that will be easily accessible and clean it with a wire brush or emery cloth.
  2. How To Install a Service Port On Sealed System
     

  3. Get the valve and hold one side on.
  4. How To Install a Service Port On Sealed System Window Unit
     

  5. Attach the other side.
  6. How To Install a Service Port On Sealed System without soldering
     

  7. Tighten down the outer screws evenly.
  8. Tighten the Screws
     

  9. After the outer screws are in place the center can be screwed in which will go into the line piercing it.
  10. Tighten the Center Screw

You can now attach gauges on the the unit and test it or refill as you would any other A/C unit.
 
There are some HVAC technicians who prefer to solder on a valve but in my experience a screw on valve works just as good.
 
This is of course debatable and is simply a preference that changes from tech to tech.
 
If you are very good at soldering and can do it quickly and reliably than soldering a valve on may be best.
 
If you just need a quick port to add refrigerant or do some test than a screw on piercing valve will work fine.
 
Screw on type valves can become loose over time and 4-5 years and may need to be tightened.
 
Window A/C units that are fixed are usually already 3-5 years old, if not older.
 
A screw on valve will more than likely outlast the units working life span.
 


 




 

One thought on “How To Install a Service Port On Sealed System Window Air Conditioner

  1. Inbouwkast

    I bought a used portable 12000 BTU AC system about 3 years ago for $60. It ran great until last year when the compressor would switch on/off. This year it won’t switch on at all due to low R-22 refrigerant. I bought the R-22 and hose ($25) to repair and find out that there is no port. There was no mention of this in the manual. A new unit is cost roughly $400. I challenge anyone to find an AC service tech to repair this for less than the cost of a new unit, or at least close. Even if you do it would still cost more than this old unit is worth. At the same time new units are made with lower quality components. It worth the small investment for me. It’s better than sending it to the trash.

    Reply

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