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

D&G Auto Service


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&G Auto Service, 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


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One of the best in the country. You think its a big problem with whatever you drive in with. Others fail at their diagnostics mechanics. Jim reads throughout his every days on up to date and mistakes made by other shops that really get customers a mistaken repair leading to more when the actual problem is fixed for 45.00 dollars and you unfortunately spent 200 to 800 plus dollars. He started with hubcaps at 5 years old his brother teaching him. I witnessed a repair shop he worked at. The owner was a naval air craft mechanic the other mechanic seasoned. The three of us couldn't believe the extensive education strength, listening skills to customers. When the other 2 mechanics had trouble we went to Jim now at D&G. This mechanic can also weld exhaust fix automatic or manual gearboxes rear ends and so much more. He's a friend to all customers and doesn't repair things that are not broken. I estimated Jim is one of the top mechanics in the United States. He tells you even to help do a lower price or best advice. Very True Statement above. Not baloney, the one you've been looking for your whole life, and yes family business. Very Honorable Very honest. Give it a try. Its true.

, 01/21/2021

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The absolute best around!

, 10/14/2020

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Great customer service and excellent professional mechanics

, 10/14/2020

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