Replace Your Car's AC Thermal Expansion Valve or Orifice Tube
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 Highlands Auto Center, 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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Read Our Five Star Reviews
This is one of the fairest, honest, trustworthy auto repair shops that I have ever visited. I began having issues with my Honda Accord. I visited at the least two other completely unrelated auto repair shops in the DFW, paid for diagnostics and was advised of other mechanical needs necessary for maintenance (that I actually paid for) but, nothing that pertained to the issue. Paid for “possible” solutions but, nothing that was done prior ever resolved the matter. I was dealing with an intermittent mechanical problem. I brought my car to Highland Auto and was treated extremely fair. I needed to visit the shop twice (intermittent issue). The first visit, a solution was found but needed additional work. Because of my prior attempts to have my car repaired resulted with the same issue, I figured that there would not be a fix. Highland Auto took the extra steps, found out exactly what the issue was and REPAIRED my car. I waited over 1 month just to make sure that the intermittent issue was actually resolved. It has been a little over a month now and I can factually say..it is fixed. To add, this repair shop provided the reassurance every step of the way. They also provided a courtesy vehicle while my car was in their shop being repaired. This took so much stress off my transportation concerns. Shockingly amazing and very fair company. Thank you Highland Auto!. You have no idea how much your positivity, fairness, and honesty and matters!
Engine Maintenance, near Dallas, Texas
Francisco (Frank) did an excellent job of repairing my breaks and some other items. My car went from undriveable to driving like new. Thanks, Frank!
Brakes, near Dallas, Texas
Did a great job very fast completion time. Good and affordable prices I highly recommend.
Auto Body & Refinishing Services, near Dallas, TX
Highlands did a great job of replacing a part on my car. Easy to work with and the work was done quickly. I will go back for future needs.
Collision Repair Services, near Dallas, TX
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