Five reasons air conditioners fail due to improper installation
Unfortunately most of these failures are impossible for the homeowner to see. But being aware of these issues will help you in picking the right contractor to install your new system.
1- FREON or REFRIGERANT LEAKS
After refrigerant lines are soldered the connections should be pressure tested and then vacuumed remove the air and moisture from the system. A vacuum of less than 500 microns should be obtained and tested that it can hold that vacuum. This assures that there are no leaks in the system. This is a simple thing but is often skipped in the installation process.
2- AIR LEAKS AT THE AIR HANDLER
Not all air leaks are positive leaks that you can feel, but many are negative, drawing in air to the unit and then pushing it into the duct system and then into the home. Many times this is from the air handler not being sealed to the platforms that they often sit on. Another most common air leak is from the high-voltage and low-voltage wiring coming into the unit along with the refrigerant lines and drain line. All of these penetrations should be sealed to prevent unconditioned air and dirt and in Florida humidity, from entering the system. These are all easily corrected with a little time, care and know how.
3- CLOGGED OR RESTRICTED REFRIGERANT CIRCUIT
These clogs are often caused by the air inside the refrigerant lines being contaminated. There are particles in the air that are burned when the refrigerant lines are soldered. This form is hash inside the piping and can clog or restrict the refrigerant circuit. To prevent this the lines should be purged while soldering with a clean dry gas called nitrogen. This will extend the life of your new system.
4- SYSTEM DOES NOT DRAIN PROPERLY
Air handler‘s that are not level hold water in the drain pan and then the slightest little debris can cause the pain to overflow and resulting water damage. I have even had customers replace perfectly good water heaters thinking there was water heater next to the air handler was leaking so a new plywood platform top properly supported and level will prevent this problem.
5- SYSTEM IMPROPERLY WIRED OR SET UP
I know I know, but you say it worked when they installed it yes, but when you turn on the heat it blows cold or not warm enough. When installing a heat pump type system ( and air conditioner capable of reverse to provide heating and cooling ) it will have what we call a reversing valve must be wired per the manufacture. To switch between heating and cooling. I have even had an electric heaters only wired to run half or less of the electric heater. It just takes a little time and know how to prevent these disappointments and bring a homeowner satisfaction with their new AC system.