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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 Jr. Auto Repair, 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.

Contact Us Today!

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What Our Customers Are Saying

Great customer service, flexible, honest and straightforward with the details.

, 10/29/2025

Just found my number one go to for any and all auto maintenance and repair! I feel like I was given a hook up! Tried and nationwide auto mechanic chain literally walking distance from me and they were a lil steep in price. Called a referred mechanic and they told me the work was too much for them. Thankfully I decided to try Jr's because casually he told me he could do everything I needed for a fifth of the price! I thought we had to be misunderstanding each other, but no. It was indeed just an unbelievable deal. I dropped off and anxiously waited for bad news, like "sorry, job was too hard after all." Or "We must quadruple the price." But less than 24 hours I get the call "your car is ready." This experience was unbelievably smooth, beautiful, and affordable!

, 10/24/2025

Clean shop, excellent service for good price!

, 10/10/2025

I got stuck in Orlando with a burnt up compressor, which fried the belt. Called Junior and he did his best to get me on the road same day. It didn’t work out and I had to spend the night. He drove me to the hotel and picked me up next day when car was fixed. Went above and beyond a normal mechanic. Took me under car and showed me exactly what was going on and needed to be fixed. No hidden cost and last minute charges. Every thing was upfront and reasonable. HIGHLY RECOMMEND

, 10/02/2025

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