R134A PT chart is a standard table. Basically, this 134A PT chart tells you what is the pressure of R134A refrigerant at certain temperatures. The charts start at the low end (-49°F) and tell you the pressures all the way to the high end (150°F). Example: What is the pressure of 134A freon at 85°F? … Read more
R22 PT chart describes the relationship between temperature and pressure. Namely, it tells you what is the pressure of R22 refrigerant gas at different temperatures. Example: What are R22 pressures on an 85-degree day? You simply consult the R22 RT chart below and see that at 85°F, the pressure of R22 is 155.7 psig. psig … Read more
All air conditioners have to be wired. Of course, you will have to use adequately sized wires. In the case of AC units, we most commonly think of 10/2 and 10/3 wires. That’s why we encounter many 10/2 vs 10/3 wire for air conditioners dilemmas. In actually, this is not a dilemma at all. The … Read more
“My AC keeps tripping the breaker. What’s wrong? How do I stop my AC from tripping the breaker?” AC tripping the breaker is annoying. Even more troublesome, repeatedly trying to run an air conditioner that keeps tripping the breaker can result in permanent damage to the AC unit. So, easy on the breaker reset button; … Read more
The thermostat setting is quite simple: Set a temperature, and AC or furnace will reach the set temperature. That’s the theory at least. In practice, we experience a problem of the thermostat not reaching the set temperature quite often. Here are just a few ways how homeowners express this temperature setting problem: “Why does my … Read more
The AC fan should always be spinning. If the AC unit is turned on and the outdoor condenser AC fan is not spinning, you have a problem. This is quite a frequent problem with air conditioners, especially during summer. Here are just a few examples of how homeowners phrase this problem: “My air conditioner fan … Read more
A window air conditioner should not be icing up, especially in the summer. If you see your window air conditioner freezing up in the summer, you do have a problem. Finding ice in an air conditioner window unit is not something that will go away on its own. What is more, running a frozen window … Read more
“I have AC running but the humidity goes up, not down. How is this possible? Why is my AC not removing humidity?” An air conditioner not dehumidifying is quite a paradox. If you are experiencing relative humidity going up when air conditioning is on and cooling adequately, that is quite extraordinary. Normally, when you run … Read more
AC drip fan full of water is the worst. The air conditioner drip pan should never be full. If it is full, there is something wrong with your air conditioner. The culprits for a drip pan for air conditioner overflow are usually the same as the reasons why the drip pan is full of water. … Read more
“My air conditioners starts OK; then it stops in seconds/minutes. What’s wrong?” One of the most annoying (and potentially harmful) problems we encounter is air conditioner short cycling. It involves an air conditioner short cycling in seconds or minutes, without even completing a full cooling cycle. (Example of AC short cycling) Here is what you … Read more