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How Long Does an R-1234yf O2 Sensor Last, and How Do You Know It’s Near the End?
An R-1234yf recovery machine's oxygen sensor is a consumable that lasts roughly two years —…
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Bulkhead Fittings: Routing A/C Lines Through a Firewall Cleanly
Running A/C lines through a firewall without a bulkhead fitting means a hose that chafes,…
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A/C Fitting Sizes Explained: #6, #8, #10 and #12
Every A/C fitting listing carries four numbers that never match each other: Size, Tube Size,…
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How a Car A/C System Works, Component by Component
A car's air conditioner doesn't make cold; it moves heat. Follow the refrigerant around the…
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Symptoms of a Bad A/C Expansion Valve: Stuck Open vs. Stuck Closed
An A/C expansion valve fails in two opposite ways. Stuck closed, it starves the evaporator;…
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How to Build a Custom A/C Hose: Measure, Cut, Crimp, Check
Pre-made A/C hoses fit one vehicle. A hose you build fits the one in your…
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Restoring Vintage Radiators: The Safe Way to Braze Thin Aluminum Fins
Finding a replacement radiator for a classic car or custom build can be impossible. When…
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Preparing the Joint: Cleaning Tips for Oxidized Aluminum HVAC Piping
If you treat aluminum like copper, you will fail every time. Aluminum oxide is an…
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How to Market “Green” A/C Services to Eco-Conscious Customers
Customers care about their carbon footprint. Discover how to reframe your A/C services as "green"…
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