Auto Ac Orifice Tube Location
At the Orifice Tube the refrigerant is forced to flow through a fine restriction. This causes a pressure drop and a temperature drop in the refrigerant entering the evaporator. A fine gauze filter is located at the inlet and outlet sides of the orifice tube to filter any contaminants from passing on to the evaporator. The difference in this system is the Orifice Tube usually located in the entrance to the evaporator, in about the same location as the TXV, this is a fixed orifice and not variable. Refrigerant flow control is accomplished by cycling the compressor on and off or with a variable output compressor. I'm replacing the accumulator and orifice tube. Find answers to your 2005 Ford Explorer question from certified mechanics and auto experts. Where is the orifice tube located. 2005 Ford Explorer Close.
Expansion Valves: The expansion valve is a complex valve which regulates refrigerant flow at the evaporator inlet with an internal moving rod mechanism. This rod opens and closes to differing heights based upon the cooling burden put upon the system. This process of metering modulates the flow according to the temperature of the refrigerant in the evaporator coil. Too much refrigerant could cause the evaporator to get too cold and even freeze up the coils. Too little refrigerant would result in inadequate cooling.
The refrigerant which enters the expansion valve is high-pressure liquid, and is warm. The liquid which flows through the valve and enters the evaporator is low-pressure and cold. This is the exact point where the refrigerant has passed from what is known as the “high side” to the “low side” of the system.
An orifice tube is an expansion device that controls refrigerant volume in front of the A/C evaporator. This tube prevents your evaporator from freezing. Unlike an expansion valve, an orifice tube is not adjustable. Other parts work with the orifice tube to regulate volume as the compressor cycles on and off as needed.
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.
It becomes necessary to replace the orifice tube if the fine mesh screen or the internal components of the orifice tube become plugged, restricting refrigerant and lubricant flow. Orifice tubes also designate the dividing point between the “high” and “low” sides of the system.
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Clogged orifice tube
Max-Lumina on Sat July 16, 2005 6:52 PM
Year: 1993
Make: Chevy
Model: Lumina
Engine Size: 3.1
Refrigerant Type: R134
93 Chevy Lumina 3.1 , R134 - Original Symptons = Load Clanking Knocking Noise from compressor , no cold air , clutch engages , high pressure readings on the low side ..
In replacing the orifice tube , found the old one very clogged ..
Will replacing the orifice tube correct the compressor problem,
or should I plan on replacing the compressor while I have the system discharged ?
Will also be replacing the accumulator / dryer ?
Many thanks to the contributors of this forum ..
tony1963 on Sat July 16, 2005 7:27 PM
Auto Ac Orifice Tube Locations
My suggestion is to flush the whole system, replace the compressor, drier, orifice tube and pressure switch.
I just did a Cadillac for a customer. It needed a retrofit. The orifice tube was really dirty. I recommended a new compressor but they said, 'just make it blow cold air'. Again, I recommended a compressor.
Oh well. We did the service. Made cold air for about two hours. Then, the fuse for the AC blew. It blows almost instantly.
Bad compressor/clutch.
Should have done the whole job right.
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Grove Automotive Group, Inc.
An Alabama Corporation
Chick on Sat July 16, 2005 8:07 PM
QuoteOriginally posted by: Max-Lumina
93 Chevy Lumina 3.1 , R134 - Original Symptons = Load Clanking Knocking Noise from compressor , no cold air , clutch engages , high pressure readings on the low side ..
In replacing the orifice tube , found the old one very clogged ..
Will replacing the orifice tube correct the compressor problem,
or should I plan on replacing the compressor while I have the system discharged ?
Will also be replacing the accumulator / dryer ?
Many thanks to the contributors of this forum ..
Probably not. Your car uses the V5 compressor, and although very sturdy, I would guess it's shot. If it clogged the o tube really bad, figure on changing the condenser also. since you car uses a very narrow pass condenser, and I doubt flushing would remove the junk.Then a 'Quality' reman or new compressor, O tube and acumulator. The right amount of BVA Auto 100 ester (8 ounces) and a good vac/charge. Di it right and you'll do it once.Keep the penguins happy too..
Check out
Ackits.com for quality replacement parts, vehicle specific O ring kits, BVA oil, and Nylog assembly lube (you won't have leaks) Then do the work yourself and either have a shop do the vac/charge or follow these Vac/charge procedures
And you should have great cooling for years to come.Hope this helps
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Chick
Email: Chick
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Auto Ac Orifice Tube Location Diagram
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