It is not uncommon to find Ed, the owner of Trinity, speaking to customers over the phone, when temperatures are high and a customer is stranded without air conditioning for a day or two. When we are at our busiest he often asks what is going on with your unit and, in some circumstances, can even get you cooling until one of our technicians can visit your home.
Below is a list of some of the problems your unit encounters so you can know what may be wrong with your unit next time!
Unlike most furnaces, air conditioners are complex mechanical systems that depend on a wide variety of conditions to work correctly. They are sized to meet a certain “load” on the house. They are designed to have certain amount of refrigerant, known as the “charge”. They are designed to have a certain amount of air flow across the coils. When any of these things changes, the system will have problems.
If you produce more heat indoors either from having more people or appliances or because of changes in the house, the air conditioning may not be able to keep up.
If the refrigerant charge on the system leaks out, it lowers the capacity of the system. You will simply get less cooling and system will not be able to keep up when the load gets high.
If airflow across the outdoor (condenser) coil is reduced, the ability to reject heat outdoors is reduced and the again the capacity of the system may go down, especially at higher outdoor temperatures.
In dry climates such as the Southwest United States, the same issues happen with regard to the indoor (evaporator) coil: higher airflow helps, lower airflow hurts. In humid climates, the situation is more complex. At higher airflows, there will be less dehumidification, leading to high indoor humidities. If the airflow gets too low, however, the evaporator coil may freeze. This makes performance worse and can damage the compressor until it fails - leaving you with an expensive repair bill and no cooling!
This is why keeping up a maintenance plan is so important! The cleaner your unit and coils are, the more efficient your unit can run!
Read more here.