And we can sell them for a fraction of the price because we cut out the middleman and pass the savings on to you. gauges with impact-resistant lenses, Sight glass for viewing condition of refrigerant. It's just that simple! It's just that simple! We have invested millions of dollars in our own test labs and factories, so our tools will go toe-to-toe with the top professional brands. Don't get scammed by websites pretending to be Harbor Freight. And we can sell them for a fraction of the price because we cut out the middleman and pass the savings on to you. Test, diagnose, and recharge R134A air conditioning systems. He started freelancing in college for local publications in Boone, N.C. and is continuing his career through online freelancing with a specialization in affiliate marketing, blogging and SEO. For example, if the temperature inside your home is 70 degrees, then the PSI should be around 140. How to Replace the Anti-Siphon Valve in a Lawn Genie, How to Troubleshoot Low Pressure in a Home Hot Water Heating System, How to Connect a Compressor to a Sprinkler System, How to Tell if Your Air Conditioner Is Frozen, How to Install a Tankless Water Heater Pressure Relief Valve, 12 indoor plants you dont need a green thumb to keep alive. Connect the blue gauge on the C-manifold to the low side service port on the AC unit. Limitations apply. Don't get scammed by websites pretending to be Harbor Freight. And we can sell them for a fraction of the price because we cut out the middleman and pass the savings on to you. For California consumers: more information about our privacy practices. Get 10% Off Your Entire Purchase When You Open a New Account, Get our best deals and latest news delivered straight to you. Write down the pressure readings from the blue and red gauges. We have invested millions of dollars in our own test labs and factories, so our tools will go toe-to-toe with the top professional brands. We have invested millions of dollars in our own test labs and factories, so our tools will go toe-to-toe with the top professional brands. Owner's Manual & Safety Instructions (PDF), Precise high side (0-500 PSI) and low side (0-120 PSI) pressure readings, Color coded gauges, valves and hoses to ensure correct installation, Large 2-1/2 in. This A/C Manifold Gauge Set can be used to test, evacuate and fill R134A air conditioning systems. Turn on the AC unit at the thermostat and allow it to run for about 20 minutes then turn it off. Charles Poole holds a Bachelor of Arts in creative writing from Appalachian State University. Don't get scammed by websites pretending to be Harbor Freight. Air conditioners remove the moisture from the air inside your home in order to cool the residence. Get 10% Off Your Entire Purchase When You Open a New Account, Get our best deals and latest news delivered straight to you. This pressure should be around two times the temperature of the air inside the home. For any difficulty using this site with a screen reader or because of a disability, please contact us at 1-800-444-3353 or cs@harborfreight.com. Get 10% Off Your Entire Purchase When You Open a New Account, Get our best deals and latest news delivered straight to you. Note: Specifications are approximate and subject to change. And we can sell them for a fraction of the price because we cut out the middleman and pass the savings on to you. For any difficulty using this site with a screen reader or because of a disability, please contact us at 1-800-444-3353 or cs@harborfreight.com. It's just that simple! Connect the red gauge to the high side service port on the AC unit. How do I Vacuum an R22 Air Conditioner Using Manifold Gauges? For any difficulty using this site with a screen reader or because of a disability, please contact us at 1-800-444-3353 or cs@harborfreight.com. It's just that simple! Open the gauges to get the PSI readings on your unit. For any difficulty using this site with a screen reader or because of a disability, please contact us at 1-800-444-3353 or cs@harborfreight.com. The high side is the smaller pipe on the unit. We guarantee this product to be free from defects in materials and workmanship 90 days from the date of purchase. For California consumers: more information about our privacy practices. Don't get scammed by websites pretending to be Harbor Freight. How to Check the Thermostat in a Whirlpool Dryer Model LER4634EQ0, How to Adjust the PSI on a Water Pressure Reducing Valve. For California consumers: more information about our privacy practices. Although you can check the refrigerant pressure yourself, a licensed HVAC technician should ultimately handle the repairs to your AC unit. For California consumers: more information about our privacy practices. These gauges give you a reading in pounds per square inch (PSI). This A/C Manifold Gauge Set is designed to test R134A air conditioning systems by comparing the "high side" and "low side" pressure readings. If you are having problems with your air conditioner, you can use a C-manifold gauge to check the refrigerant pressure in the system. The low side is the larger pipe coming out of the unit. Get 10% Off Your Entire Purchase When You Open a New Account, Get our best deals and latest news delivered straight to you. If the low side pressure is between 28 and 30 PSI, there should be cool air coming from the vents in the inside of your home. We have invested millions of dollars in our own test labs and factories, so our tools will go toe-to-toe with the top professional brands. If the air is not cool, consult a licensed HVAC technician to diagnose the problem. Check the high side pressure. Consult a licensed HVAC technician if the pressure is higher or lower.