Working Hours
  • Mon 8:00AM - 6:00PM
    Tue 8:00AM - 6:00PM
  • Wed 8:00AM - 6:00PM
    Thu 8:00AM - 6:00PM
  • Fri 8:00AM - 6:00PM
    Sat Closed
  • Sun Closed
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316-788-1641 | 772 N Baltimore, Derby, 67037

Replace Your Car's AC Thermal Expansion Valve or Orifice Tube

D & B Service Center

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 D & B Service Center, 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 Are Saying

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We lived in Derby for 25 years before moving to Florida. Brad and the gang at D&B have always been honest with us when we needed work done on our cars. My mother is still there and continues to use them. Recently we had to purchase a new vehicle for her and Brad was amazing helping us get the new vehicle checked out. It's difficult when you aren't right there, but they went above and beyond in the Service Department!!! They are honest and really good people! When you need something done or help they always go the extra mile! They really treat you like family and knowing we have Brad there to help my mother and watch over her cars helps us to sleep better at night. It's a great business!

, 05/04/2020

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Appointment was made one week in advance the shop got the car right in as scheduled. The correctly diagnosed the problem and called with estimate on the cost for repairs and requested approval to fix. The vehicle was repaired the same day and the total invoice was less than the estimate. The owners and staff are very knowledgeable and very customer service oriented. I would give them an A plus rating based on my experience and will definitely be a return customer.

, 05/04/2020

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I have had brake repair and oil change service at D&B Service Center. On both visits I was treated in a timely and professional manner. The service estimate was very accurate with no surprises.

, 05/04/2020

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D&B is awesome! Brad is honest, helpful, and very knowledgeable! A true Derby homegrown business!

, 05/04/2020

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I brought my car here to get some new tires put on it. They were reasonably priced. The staff was nice and extremely helpful and informative. I highly recommend them.

, 05/04/2020

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These guys are honest, do good work, and are friendly. Refreshing to find a car repair service like this, they are the best.

, 05/04/2020
  • ASE (Automotive Service Excellence)
  • IDENTIFIX
  • Jasper
  • Car Care Aware
  • Call Us For Service: 316-788-1641