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 Marv's Hometown Tire & 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.
What People Say About Us
I cannot say enough amazing things about the staff and service that we received at Marv's! My son is there for college and needed some work done on his Jeep. The staff was so friendly and knowledgeable and made me feel very comfortable from very far away. I highly recommend Marv's!
Robin R Schawe, 09/14/2023
They keep my old beat up car running, I can afford their rates, they've always gotten it turned around in time so I've never missed work, and they stood behind their warranty when I needed an adjustment.
They are like family takes great care of me. Referred many family and friends who are taken very well care of. I can be out and talk about cars and I meet a stranger who recommends Marvs to me and I smile because all my vehicles there.
I have a hard time believing some of these one-star ratings are talking about the same place that I'm thinking of. Marv's is FANTASTIC and full of great people who want to do anything they can to please the customer. Sometimes they even vacuum or wash my car for free if they have a few minutes of time on their hands (which is rare)! I love this place and have referred tens of hundreds of people to them!
Incredible service, work and integrity at Marv's !!! They made my 03 Windstar drive like it's brand new again!! Laura is a true gem! I appreciate her knowledge and experience. She explains exactly what is going on with a vehicle and in terms a person can understand. Keep up the GREAT WORK!!!!
Great place. These good folks have always taken good care of me. VERY fair in pricing.
