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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 Cottin's Automotive, 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.

More AC Repair Services:

Truck and Car AC Repair Services

Freon Recharging Services For Your Car Or Truck

AC Evaporator Services


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OUR REVIEWS

 (2 Reviews)
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reviewiconOil Change, near Port St. Lucie, FL

I had just converted my 2020 Hyundai Elantra from a lease to a purchase and now owned a car I thought I was going to turn in. I had not done any of the maintenance except for oil changes as I thought Hyundai would be taking care of that. With the car over 40K miles and due to experience with other prior purchases, I figured I was in need of a transmission oil change, Radiator flush and a engine oil change. The nice people at Cottin's made an appointment and we got together on the appointed date and time. They had the car on the rack about 15 minutes and came out to tell me my transmission oil was nowhere close to being due. Per Hyundai, that was a 120K service and they had a tamper sticker over the plug as it probably should be done at Hyundai direct. I asked them about the radiator. Again, due at approx 80k and my car was only 40k. They offered to still do the service if I really wanted to waste the money, but said it was not necessary. All I really needed was an engine oil change, air/cabin filters and some wiper blades. They took care of those items quickly and efficiently and the cost was very reasonable. Most other shops I know would have done the work I originally requested and not said a word, happy to make the quick buck without me being the wiser. Cottin's on the other hand only did what was needed and did it well. I am very pleased with the services done and will be back in the event I do have a break-down or when I do hit the mileage for the other services. Thank you for being SO honest and transparent. You have earned a customer for life!

, 06/21/2022

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