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 RST Automotive, 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 People Say About Us
Roger at RST rebuilt my 1956 Imperial's hemi superbly. This is not an easy feat to say the least and I couldn't be more appreciative.
The real one stop repair shop!
I have been a loyal customer for over 7 years with rst, Roger really knows what he's talking about and always takes the extra mile to make sure my car is not only road worthy but explains why my car needed service would recommend to anyone! If you need service and live in the tri-city area check this shop out!
Roger has exclusively worked on my automobiles for approximately a decade. This shop is like no other. You get the truth. You get expert repairs. You get expert customization. This shop builds racecars and has been around a long time. If you want the local equivalent of the Indy 500 pit crew working on your vehicle at competitive pricing, go here. If you want cheap repairs that cost more in the long run, sell your car.
Great Place. Great customer service. Very polite and informative.
This is a great repair shop,, it took me years to find a good mechanic and I finally found a knowledgeable, friendly and very good mechanic to service my car. I highly recommend RST for all of your automotive needs.