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Recovering Refrigerant WITHOUT Using a Refrigerant Recovery Machine
As a service technician, one of the jobs you will be doing nearly every week is recovering refrigerant. There are two methods of removing.
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62 technical articles with recent search interest. Search titles and topics below.
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HVAC Training - The PT Chart and Saturation Temperature
As an air conditioning service technician, one tool that you should be using all of the time is a Pressure-Temperature or P-T chart/card.
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Steps to Measuring Superheat
Steps to Measuring Superheat: 1. Attach your low side (suction) refrigerant gauge to the suction line service port at the condenser coil.
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HVAC Training - Troubleshooting a Honeywell Smart Valve
HVAC Training - Troubleshooting a Honeywell Smart Valve. Here are some TROUBLE-SHOOTING TIPS that can help in your career.
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Airflow Calculation
Measuring a system's airflow using the temperature rise method does not require any expensive airflow measurement tools, just a thermometer
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HVAC Training - Mold on an Evaporator Coil
Many times during a maintenance visit you will find mold growing on the evaporator coil. Most HVAC technicians will immediately recommend
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Replacing an HVAC Blower Motor Step-by-Step
In order to ensure that the process runs smoothly, verify that the proper replacement of HVAC blower motor is on hand and wiring is correct
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Condenser Fan Cycling Controls
Condenser Fan Cycling Controls: This information is part of our online HVAC course - Commercial Refrigeration for HVAC Technicians
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Non Condensables
One of the more difficult AC system problems to diagnose is non-condensables in the system. These are always caused by the improper system.
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Potential Relays - What Happened to Terminal 3?
Potential relays also known as voltage relays are used in capacitor-start capacitor-run (CSR) motors. We provide online HVAC Training.
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Be the Guru of Current Relays (we will unlock the mystery together)!
90% of HVAC techs do not understand current relays or how they work. This is one area of knowledge that will take you one step closer
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HVAC Training - Commercial Refrigeration Headmaster
The headmaster controls the head pressure of a refrigeration system during low ambient conditions. This ensure proper pressure drop across the expansion device.
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The Subcooling Process
The process of removing heat from the refrigerant so that its’ temperature is below the saturation temperature is called Subcooling.
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Troubleshooting Air Conditioning Compressor Motors Like A Pro
How to troubleshoot air conditioning compressors like a pro. Air conditioning compressor motors are very simple to diagnose but can be confusing
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Capillary Tubes (Cap Tubes)
Cap tube systems are used to store already refrigerated products. If non refrigerated products are placed in a cap tube refrigeration system
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HVAC Training - Cleaning up a Burned out Compressor
HVAC Training - Cleaning up a Burned out Compressor, There are several ways a compressor motor can fail. One of these ways for burnout.
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HVAC Training - Underfeeding & Overfeeding TXV
You can learn about an air conditioner TXV and more by signing up for our HVAC Certification Training Course. We are now adding interactive lessons.
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The Six Classes of Refrigerant Leaks
Refrigeration leaks a quite common in air conditioning and heat pump systems and can be difficult to detect. It takes practice and tools.
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Using Refrigeration Gauges to Convert Pressure to Saturation Temperature
The only purpose for using your refrigeration gauges is to convert the refrigerant pressures to corresponding saturation temperatures.
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HVAC Training Class - Refrigeration Tubing
There are notes, tips, and knowledge that you accumulate over the years when you're an HVAC tech. HVAC Training Class - Refrigeration Tubing
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Troubleshooting a Reversing Valve
Reversing valves don't often fail, but when they do it can cause a lot of confusion while troubleshooting. There are three main things that can cause
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Heat Pump Defrost Control Boards Step-by-Step
Winter will soon be upon us and it is time to brush up on our heat pump defrost controls. Here is a quick review of what you need to know.
Commercial Refrigeration
Commercial Refrigeration - Walk-in Cooler Operation
The commercial refrigeration cycle for medium temperature walk-in coolers is exactly the same as residential air conditioning systems
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HVAC Training - Commercial Defrost Timers
There are many different ways to control defrost but, in light commercial refrigeration applications a defrost control timer is most often used.
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Using Jumper Wires as a Troubleshooting Tool
Jumper wires, when used correctly, are a great tool to help you troubleshoot HVAC equipment. But, when used incorrectly, they can damage the system
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Understanding the Defrost Control Board - Part 4 Testing
If you suspect there is a problem with the defrost control board, thermostat, or defrost timing here are the procedure for testing.
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HVAC Training - Residential Duct Systems
The second half of proper airflow in a residential HVAC system is the ductwork. Residential Duct Systems to do this you have to understand.
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HVAC Training - Understanding Simple Circuits
The key to reading schematics and troubleshooting electrical faults on an HVAC system is understanding simple circuits,looking at schematic,
HVAC Training Articles
Capillary Tubes in 15 Minutes
Sometimes you do not have the capillary tubes size recommended by the manufacturer. The following J/B conversion chart shows....
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Understanding Capillary Tubes
Begin HVAC training online on your terms. Study at your own pace and get assistance when you need it. Capillary Tubes training is offered..
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Nitrogen Purging and Brazing
Most HVAC installation instructions require flowing nitrogen through the copper tube during brazing. Nitrogen Purging and Brazing....
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HVAC Training - Refrigerant
When the refrigerant leaves the compressor, the refrigerant in the discharge line is all vapor. As this is moves through the condenser
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Heat Pump Reversing Valve
Reversing valves don’t often fail, but when they do they can cause a lot of confusion while troubleshooting. Heat Pump Reversing Valve...
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Air Conditioning Training - Electric Circuits 1
All electric circuits must have 3 elements to work properly, these elements are: Line, Switch, and Load. You must understand
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HVAC Training - TXV Overview
A TXV or Thermostatic Expansion Valve is a refrigerant metering device design to maintain a constant level of superheating.
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Basic Operation of Automatic Pump Down Medium Temperature Walk-in Coolers
You can learn HVAC at home, online, at your own pace. Short assignments you can compete in and evening. Affordable monthly tuition. Sign up now!
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HVAC Training - Flame Sensor and Flame Rectification
Flame rectification is a method of flame sensing in modern gas furnaces where the flame sensor is located in the pilot or burner flame....
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HVAC Training in Tampa, FL
If you live in the Tampa, FL area and would like to learn how to repair and service air conditioners and get your HVAC Training in Tampa.
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Understanding a Heat Pump Defrost Control Board - Part 1
Many new air conditioning technicians are intimidated by the number of wires going to and from a heat pump defrost control board.
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HVAC Training - Cooling Terms
Here is a list of a few cooling terms HVAC technicians must be familiar with:Sensible Cooling Load – The heat gain of the home due to conduction
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Six Steps - Checking a TXV
Checking a TXV: If you suspect you have a bad TXV, the first thing you must ensure is that the system has a proper charge.
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Troubleshoot an HVAC System 24 Volt Problem With Confidence
Trying to troubleshoot control wiring is sometimes confusing and frustrating. But, if you have a step-by-step procedure it becomes easy and accurate.
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Heat and Heat Transfer
One of the most important concepts to understand when learning to be an HVAC Technician is temperature and theory of heat. Our HVAC Boot Camp Course will p
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Duct Work and Airflow Principles - Part 2 of the Airflow Series
Before we can apply the formulas in Part-1 of our multi-part series, it is important to understand a few more concepts... blower performance and more.
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Refrigeration and Air Conditioning Training - The Evaporator Circuit
Air Conditioning Training - The Evaporator Circuit The evaporator coil is placed in contact with the warm air of the conditioned space.
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Schematic Reading for HVAC Technicians
Schematic diagrams not only identify the electrical components in an HVAC system but how they are interconnected and how the system works.
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Checking the Refrigerant Charge in the Colder Months
Checking the Refrigerant Charge, As a troubleshooting tool, subcooling can be checked when outdoor temps fall below the range of the manufacturer's subcooling charts.
HVAC Certification Course
HVAC Training - Course Curriculum
Our online HVAC Training or Classes included entry-level, intermediate, and advanced level Heating and Air Conditioning courses.
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HVAC Training - Power Factor
The power factor represents the fraction of the total possible power that can be generated in a circuit. Since most of the loads in an HVAC are inductive.
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Operating Principles of a Honeywell Smart Valve - Part 2
Operating Principles of a Honeywell Smart Valve: The steps to correctly troubleshoot Smart Valves are as follows:
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Operating Principles of a Honeywell Smart Valve - Part 4
To correctly diagnose system problems in Smart Valve products you should have a digital multi-meter or an analog meter
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HVAC Training in Albany, GA
..So how do you find the right HVAC training in Albany? It all depends on your financial situation, how much time you have each day to study
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How to Diagnose a 24 Volt Short
One of the hardest problems for HVAC Techs to diagnose is a 24-volt circuit problem in an HVAC system. There is one reason why.
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HVAC Training - Superheat
We use the superheat and subcooling levels of an air conditioning system as a measure of the system's operating conditions.
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Air Conditioning Training - Electric Circuits 2
Air conditioning technicians are in high demand. We offer an affordable air conditioning (HVAC) training course online. You can do it! We will help you!
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HVAC Leak Detection - Everything Leaks
If you are new to the HVAC field, here are some quick and basic leak detection procedures to help you locate the source of the leak.
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Refrigeration and Air Conditioning Training - Superheating Suction Vapor
by Ron Walker Superheating Suction Vapor When all of the liquid refrigerant in the evaporator circuit has boiled off only vapor remains in the circuits. At
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Tackling a TXV - Part 2
Do you want to learn more about TXVs? Maybe you want to study and become an HVAC Technician. We can help please visit or call (904) 671-7144
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HVAC Training - Moisture in an HVAC System
Moisture that enters the HVAC system can cause many and serious problems, such as moisture freezing in the refrigerant control orifice
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HVAC Training - Head Pressure Control in Commercial Refrigeration
by Ron Walker Head pressure control is required because refrigeration equipment unlike air conditioning equipment must be able to run in very low ambient o
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HVAC Training - Ohm's Law
In the HVAC field understanding, the electrical theory is by far one of the most difficult areas of study. One of the key concepts is Ohm's Law.
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Electro-Mechanical Defrost Timers
Want to learn more about Mechanical Defrost Timers. We have online HVAC training to help you jump start your HVAC career. Call 1-800-682-9910