If your air conditioning system suffered major damage, it may be leaking refrigerant, or worse, have foreign particles which can destroy the whole system. Even when replacing refrigerant, it is important to completely evacuate all the old freon. This is because the system is designed to work with only one element inside. Water is a non-condensible gas so when it gets in the system it reduces efficiency until the compressor overheats or some other HVAC part fails.
When installing a new air conditioner or heat pump, the system is always tested for leaks after soldering. The soldering must be tested with pressurized nitrogen. As un-condensible gas gets forced into the condenser by the compressor, it will occupy space used for heat exchange. Even when filling the system or soldering joints, some air comes in. So the system must be evacuated to ensure proper use. You can be sure that any good Denver HVAC contractor will perform this service. It only takes a few hours. Over time a air conditioner with uncompress-able gases in it will fail after operating at high temperatures.
Not only gases, but any moisture will eventually mix with the oil lubricant in the system. As the oil migrates through the system, it becomes and acid sludge. A compressor will not last long in these kinds of conditions. The acid degrades the seals. Instead of just lubricating the interior, it will seep into the electric components of the compressor motor and short it out.
This is one of the most common causes of compressor failing. Unscrupulous HVAC contractors may try and replace the whole system instead of just flushing it, checking for leaks and replacing the compressor. Moisture not only causes electrical components to fail, it also interferes with the operation of the metering device. It can freeze inside the meter and stop it from cooling. As pressure builds up in the system, this is another reason to use refrigerant.
Of course it is not like air conditioners will last forever even with proper maintenance. This is the reasoning behind HVAC warranties. However the big manufacturers want the installer of your Denver air conditioner to be properly trained because proper installation is so important for the total life of the system.
