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Best Auto Repair, Riverside
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BIG OR SMALL,
WE DO IT ALL!

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 217 Verified Review(s)

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 Protrans Automotive & Transmission Specialists, 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


what our customers say

My family and I love this place! Our car had a leak and started smoking the day we had to leave Riverside and we found this place through amazing reviews. They were super fast and were understanding that we had to leave town urgently. The service was amazing and everyone we met were super friendly. They are also super attentive considering they remembered us and our situation even though we only spoke on the phone about it! They were also transparent about prices and fees so you don't have to worry about hidden charges and they made sure to get our approval before proceeding. This has to be a go to place if you are within range!
D
, 06/20/2022

My alternator went out on my car while I was driving to Arizona with my 3 dogs and a cat, to say I was stressed is an understatement and they had my car up and running before lunch time!! I can't tell you how much I appreciated the service and their kindness.. Thanks Jeff!!
L
, 06/20/2022

Great business, very friendly, professional, and up-front about anything related to your vehicle. Have been going to them for multiple different vehicles because of the quality.
J
, 06/09/2022

We were very impressed with their professionalism. They kept us informed at every step of the process. We will definitely be coming back.
C
, 06/08/2022

They did a diagnostic on my car and found that my transmission wasnt working anymore. They also found that my transmission was still under warranty and they sent it to a nissan dealership to get it replaced for free. I didnt even know it was atill under warranty so that was nice what they did.
S
, 05/25/2022

The folks at Protrans did a great job on my 2008 Ram trans rebuild!!! The service went way above and beyond!!! Jeff was great to work with and kept me well informed on all my options and progress!! Will be taking all my vehicles there for all work!!!
C
, 05/23/2022

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