What is a Fan Limit Switch? A furnace has two switches, a fan limit switch and a high limit switch; these switches can be separate or in one package called a combination switch. High limit switch A high limit control switch will turn off the gas to a furnace if the temperature becomes too high.… Read More »
A brazing torch is often required in HVAC mainly to solder line-sets or fix a refrigerant leak. As with many tools in HVAC, they are not the cheapest thing to buy, usually running $200-$500 dollars depending on the brand. Often, a set can be bought cheaply at a swap meet although this may be a… Read More »
Finding a refrigerant leak in an HVAC system can be easy at times, and other times, almost impossible. One method is to use a bubbly liquid sprayed around where a possible leak is to visibly see the location of the leak. Using this method does work but often requires lots of time, especially for small,… Read More »
R410A Refrigerant Pressure Temperature Chart R134A Refrigerant Pressure Temperature Chart R404 Refrigerant Pressure Temperature Chart R22 Refrigerant Pressure Temperature Chart Pressure Temp Chart R-11, R-12, R-22, R123, R134A, R404A, R-500, R502 Using an HVAC refrigerant pressure temperature chart is necessary to be sure a unit is operating correctly. Below are three free pressure temperature charts… Read More »
Having a good refrigerant scale is an important tool for an HVAC technician, mainly when adding refrigerant to a system. Knowing the exact amount of refrigerant that is added to a system is crucial in getting a job done right. What is an HVAC Refrigerant Scale? An HVAC refrigerant scale measures the amount of refrigerant… Read More »
If you have an air conditioning unit and the outside condensing fan does not shut off, there are a few common things that cause the issue. What is a Condensing Fan Motor? The condensing fan motor is located on the outside air conditioning unit and blows hot air away from the HVAC system. Refrigerant is… Read More »
If your car or truck is not cooling and needs refrigerant added, depending on the type, it can be bought at many locations. Refrigerant can be bought in small bottles called recharging kits at Auto Part stores, Amazon, or eBay. Example R134 on Amazon Supertech R-134a Refrigerant Automotive use in a 12oz Self-Sealing Container Types… Read More »
Getting a swamp cooler ready for winter is an easy task that almost anyone can do. It does sometimes require climbing a ladder and using everyday tools such as pliers and screwdrivers, so if in doubt, always hire a professional to do it for you. Each evaporative swamp cooler will be slightly different depending on… Read More »
A CEER (Combined Energy Efficiency Ratio) rating is a new standard for room and window air conditioners that rates how efficiently they operate. The DOE (Department of Energy) created the new standard for window AC units in 2011 and implemented it in June 2014, and it has become the main way to see how efficient… Read More »
An HVAC unit needs the correct pressures to operate and heat or cool a space. If the refrigerant is too low or high, the unit will not operate correctly and cause problems such as freezing up or other issues. Since pressure changes as the temperature changes, a pressure temperature chart is used as a reference… Read More »