
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 Impact Auto, 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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What Our Customers Are Saying
Amazing experience. I was visiting family and needed to get something checked out quickly. Marley was incredibly approachable, knowledgeable and willing to help when we couldn't find any other shop who would on short notice. If I still lived in town I'd make them my home shop! Highly recommend.
I called to make an appointment and when I described the issue they told me over the phone how to fix it myself. (It was apparently super easy). Other shops have charged me for the same issue in the past. This place did not. THANK YOU FOR YOUR HONESTY!!
Incredibly pleased. My husband recently inherited a 14 year old car from his grandmother that only had 47k miles on it. Needless to say, we figured it might need some work after being driven so little the last few years. Impact gave us an appointment for the same week I called, had a very friendly and knowledgable front desk staff, excellent mechanics who did the work, and didn't try and nickel and dime or talk us into needless repairs. They told us in order of what needed to be done the most and then did it the same day once we agreed. Couldn't be happier and would highly recommend them!
Incredibly pleased. My husband recently inherited a 14 year old car from his grandmother that only had 47k miles on it. Needless to say, we figured it might need some work after being driven so little the last few years. Impact gave us an appointment for the same week I called, had a very friendly and knowledgable front desk staff, excellent mechanics who did the work, and didn't try and nickel and dime or talk us into needless repairs. They told us in order of what needed to be done the most and then did it the same day once we agreed. Couldn't be happier and would highly recommend them!