Skip to main content

Best Auto Repair, Pittsburgh

CONTACT US

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 MJ Automotive 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.


Partners

IDENTIFIX
Jasper
NAPA
AAA Approved Auto Repair
ASE Master Technician
BBB Accredited Business
Rain Eater Wiper Blades
amsoil
enterprise
wix
interstate
VALVOLINE
centric
moog
kyb
wagner
Car Care Aware

What our clients are saying about us

We have established longterm and stable partnerships with various clients thanks to our excellence in solving their automotive needs!

It was the last day in my inspection period. I had made an appointment at Wright Automotive in Carnegie, where I had always taken my Pontiac. When I got there, I had found they had moved to Wexford and hadn't mentioned it on the phone. I didn't want to drive all the way out there, so I stopped at MJ Automotive. Mike fit me in and I got my car inspected that day. His prices were very fair and you can be sure, I will be back. quotes-image
reviewicon
Honest Auto Mechanic My husband had what we thought was a transmission issue but it ended up being a $200 fix. They could have easily charged us $4k for a new transmission.quotes-image
reviewicon