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<h2>What is an orifice tube?</h2>
An auto&nbsp;A/C orifice tube is an integral component of a vehicle's air conditioning system, responsible for regulating the flow of refrigerant. This small tube features a precisely engineered opening that ensures the refrigerant flows at an optimal rate from the high-pressure to the low-pressure side of the system. The primary function of the A/C orifice tube is to maintain the correct balance of refrigerant necessary for efficient cooling. It induces a pressure drop, which is essential for the evaporation process within the evaporator, where heat is absorbed.
<h2>Where is the orifice tube located?</h2>
The orifice tube in a car's air conditioning system is usually situated in the liquid line close to the firewall, right before the evaporator. This precise positioning allows it to control the flow of refrigerant effectively, ensuring the refrigerant expands as it moves from the high-pressure side to the low-pressure side of the system. Despite this common location, the exact placement can differ based on the vehicle's make and model. Some manufacturers may incorporate the orifice tube into the liquid line, affecting its accessibility for maintenance or replacement.
The process of accessing the orifice tube involves locating it on the high-pressure side, connected to the condenser, and following the refrigerant path to the evaporator. Depending on the vehicle, you may need to disconnect lines or remove components to access it for maintenance or replacement.
<h2>Auto A/C orifice tube replacement</h2>
Before commencing the A/C orifice tube replacement, it's imperative to follow a series of preparatory steps to ensure a safe and effective procedure. Here's a detailed guide to get you started:
<ul>
<li>Preparation:</li>
</ul>
Securely station the vehicle on level ground, apply the parking brake and safely interrupt the electrical system by detaching the battery's negative cable.
<ul>
<li>Pressure Reduction:</li>
</ul>
Check refrigerant pressure with an AC manifold gauge. If necessary, use an AC recovery machine to fully depressurize the system and recover the refrigerant, preventing any escape.
<ul>
<li>Tube Replacement:</li>
</ul>
Trace the orifice tube from the <a href="https://a-premium.com/condenser">condenser</a>&nbsp;to the expansion valve or accumulator along the liquid line. Free the lines and supports to access the tube.&nbsp;Delicately remove the old orifice tube, keeping its original setup in mind.
<ul>
<li>Installation:</li>
</ul>
Eliminate any surrounding dirt or debris. Affix the new orifice tube in its proper place. Securely reconnect the refrigerant lines without causing any deformation.
<h2>Reasons for choosing A-Premium orifice tubes</h2>
A-Premium orifice tubes have precise dimensions and tight tolerances to ensure accurate refrigerant metering. They can withstand the wide temperature range and vibrations of the vehicle environment. A-Premium auto A/C orifice tube design prevents contaminant intrusion and provides a secure, leak-proof seal with the refrigerant lines. Additionally, ease of installation and compatibility with various car models are our parts' advantages as well. Need your orifice tubes as soon as possible? Don't worry. A-Premium parts are dispatched within 24 hours and backed with a 90-day return and 1-year warranty. Use our Vehicle Selector for tailored part recommendations now!

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

1999 Mercury Sable A/C Orifice Tube

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