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Best Auto Repair, Eagan

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We have the right tools & knowledge to help your vehicle!

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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 Walstad Automotive Inc., 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

This place is absolutely INCREDIBLE. If you're looking for a shop this is the only place to go. Everybody was very professional and the work is A+. Pricing is great and extremely fair. I've found my new spot.
J

Dave and his team went above and beyond to repair not only my car but also my driving situation. Their big business knowledge yet small family business care is the best combination in the automotive care business. I would highly recommend using their service in your next time of need!
W

Another very pleasant experience. Service is prompt and friendly. They do great work and stand behind it.
T

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