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Yearly Archives: 2017

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How to Repair a Frozen Air Conditioner

Plumbing and heating expert Richard Trethewey shows how to prevent ice buildup from shutting down an air-conditioning system. (See below for steps.) Click here to SUBSCRIBE to the official This Old House YouTube channel: http://www.youtube.com/subscription_c… Steps for How to Repair a Frozen Air Conditioner: 1. Clean or replace the return-air filter to ensure it’s not obstructing the flow of fresh air to the air conditioner. 2. Confirm that the size of the air-conditioning unit can accommodate the diameter and number of cool-air ducts. 3. Remove the metal access panel to expose the evaporator coil. 4. Check the size of the outdoor condenser unit. Typically one ton of cooling is needed […]

Auto Air Conditioning Systems at a Glance

Automotive Air Conditioning came about in the 1940’s. Since then, technologies such as computerized automatic temperature control, which allow you to set the desired temperature automatically, have added a great deal of complexity to today’s modern air conditioning system. Also we now have tough environmental regulations that regulate all tasks, such as recharging the system with refrigerant, evacuating and charging the PAG oil needed by the compressor. Al this due to scientific studies, that have proven the damaging effects of refrigerant to our ozone layer. Today’s automotive technician is required to be certified to purchase refrigerant, and repair your air conditioner. The shop must also incur the cost of purchasing […]

How automotive HVAC systems work

ACDelco makes air conditioner parts, compressors, condensers, filters and engine cooling motors to keep your cars and trucks running cool. This short animation shows you how automotive HVAC systems work. Ask your trusted ACDelco certified technician to inspect your HVAC system during your next maintenance. For more information, view ACDelco’s Automotive Systems Guide http://www.acdelco.com/auto-systems-g… http://www.acdelco.com/auto-systems-g… (HVAC) http://www.acdelco.com/auto-repair-se… (Search For Service Center) Most HVAC concerns occur when you least expect it, and often at the most inconvenient times. No heat to defrost the windshield? Roasting in the summer heat? The vehicle’s heating, ventilation and air conditioning system is composed of three sub-systems that all work together to provide conditioned air to […]

Online HVAC Training – Commercial Refrigeration

This HVAC class is the first in a series so you can learn the basics of commercial refrigeration. Become a Better Technician This easy to follow course compares air conditioning to commercial refrigeration, their similarities and differences. You’ll finish this course with a thorough review of the refrigeration cycle, an important part of commercial refrigeration. Contents and Overview In the XX minutes of video content you’ll learn the differences between commercial refrigeration and air conditioning. By the end of this course you’ll be ready to move on refrigeration components. Lesson 1 – Temperature Ranges Lesson 2 – The Refrigeration Cycle Lesson 3 – Comparing Commercial Refrigeration With Air Conditioning Lesson […]

HVAC Training – Dual Capacitor Checkout

This is part of our Online HVAC Certification Program. Working together with HVAC Contractors, we provide the classroom, they provide the hands-on OJT. Following the NCCER Curriculum this four level course takes approximately 2 years to complete. In just one or two modules you will learn the following: 1. Describe the fundamentals of electricity. State how electrical power is created and distributed. State the safety practices associated with electricity. Describe the difference between alternating current and direct current. 2. Explain basic electrical theory. Define voltage, current, resistance, and power and describe how they are related. Use Ohm’s law to calculate the current, voltage, and resistance in a circuit. Use the […]

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