Your car or truck's AC system is under extreme pressure and the thermal expansion valve or orifice tube monitors the amount of pressure and the temperature of your A/C system. It calculates the precise amount of refrigerant that can safely go into the evaporator. A failing expansion valve or orifice tube often causes a vehicle's air conditioner to blow hot air.

Replace or Repair

  • Expansion Valves: Too much refrigerant causes your evaporator to get too cold whereas too little refrigerant would result in inadequate cooling. The expansion valve is a complex valve that regulates refrigerant flow. This process of metering the refrigerant adjusts the flow according to the temperature of the refrigerant in the evaporator coil. Talk to one of the pro mechanics at Avus Autosport, as this part can be replaced on its own and does not require the entire replacement of the AC assembly.
  • Orifice Tubes: Unlike the expansion valve, the orifice tube is a simple fixed device with no moving parts. It therefore cannot vary the flow of refrigerant into the evaporator, but rather causes a permanent restriction in the system. However, like the expansion valve the orifice tube regulates refrigerant flow through the system and filters debris which may come through in its screen. Often fixing a "bad orifice tube" requires replacing the entire evaporator assembly.


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What our clients are saying about us

We have established longterm and stable partnerships with various clients thanks to our excellence in solving their automotive needs!

My convertible top was not working so I took my car to Santa Monica BMW for a diag. Santa Monica BMW tried to charge me 10k to fix the roof and I knew something was wrong so I took my car to Avus Autosport, they were able to fix a hydronic line in my roof and tension cable for less than 2500$. The owner was so honest and kind and did great work. Taking my car to Avus saved me 7500$!! So now I have more money for my next fun car. It’s hard to find an honest mechanic now adays but Avus delivered and didn’t try to up charge me or sell me services I didn’t need. I highly recommend Avus if you have a European car, it’s clear the owner is an enthusiast himself and treats customers like family. Great service! And the best part is that they use OEM BMW parts so they come with a 2 year warranty, I trust Avus to get the job done right for a fair price. quotes-image
, 08/21/2026
Can not say enough good things about Andrew, Sandro, Ruben and the whole group at Avus Autosport. As soon as you walk in you can tell that they take pride in their work. The shop is what you would want it to look like if you built one yourself. However the most important part of any shop is their knowledge and here once again they excel. The work they did on my car was top notch and done in an expedient manner. They know exactly what they are doing and then get it done in a reasonable time frame. Each time I have taken my car here they have been less expensive than I was thinking and done better work than I was expecting. They also stand behind their work and are extremely accommodating when addressing any issues or questions you may have.quotes-image
, 08/05/2026