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Best Auto Repair, Rockville

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 12 Verified Review(s)

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 Capital Fleet Services LLC, 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 say

These people are good .I had blow out last night on I 64.in VA. Didn't have no food. Jaime veron and his daughter brought me a food. and my tire was fixed by Paul.in no time. Thank you guys and GOD bless you
M
, 11/13/2021

I highly recommend Capital Fleet Services. Paul was very polite and showed up quickly, fixed the brake chamber and got me back on the road!
S
, 09/23/2021

Paul arrived on time and made the repair quickly. They did a good job diagnosing the issue, finding the parts and bringing the right parts.
J
, 09/22/2021

FOR ANYONE IN NEED OF HELP with light , medium or heavy duty vehicles this is the place. THERE SERVICE CREW IS MOBILE ..The tech's are always on point & they get the job done.. I can't say enough great things about this company they've saved my butt a few times now & they keep my trucks going..Thank you guys .. TRY THESE GUYS FIRST
L
, 09/18/2021

I had a truck broke down and he was running tight getting to his reload. Jaime got out to him, assessed what parts were needed to repair it. He ran across town, got them and returned and had my driver back on the road in less than two hours. By far he exceeded anything I could have expected and was very reasonable in his charges. Give him a call an I am sure you will be happy with the results. John Dickson BTI Special Commodities
J
, 08/25/2021

Quick response, always on time and deep technical prowess.
T
, 05/21/2021

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