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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 J & N Auto Service, 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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I have been a customer of Jimmy's for at least eight years and he's the best mechanic in Atlanta. He has saved me tons of money over the years. He's honest and the best thing about his work is that he will get it right, when nobody else will. The people who know Jimmy and his work, faithfully bring their cars to him. When the job or the repair is really important, I only trust Jimmy. Mechanics everywhere owe Jimmy their gratitude for he surely is in a league all of his own in terms of consistency, quality, integrity and execution- all traits that 98% percent of mechanics know nothing about. Jimmy gets FIVE STARS from me, and you can take that to the bank brother!

Excellent, honest, fairly priced, fast service! I recently moved to Georgia and was in need of new rear brakes on my Suzuki SX4. I found J & N Auto online and gave them a call. Even though there were other vehicles being serviced, my brakes were finished within a couple of hours! This is not one of those franchise repair shops, just a good honest mechanic/owner with a staff of professional mechanics in a shop. I would DEFINITELY RECOMMEND Jimmy and his staff to anyone and will continue to call upon them in the future.

I decided to write this review months after my visit and I just wanted to say it was a great experience. My car still runs smoothly and the service was fast. Highly recommended.

Jimmy, the owner/mechanic, was professional and gave me a great deal, in comparison to my own research of what repairs I needed. Great place, huge shop, name brand parts, good customer service and repaired my vehicle in a timely manner. I recommend his services.

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