Denver HVAC Repair

This problem can be caused by an air-conditioning system that is too large for the house. If your system has always failed to dehumidify adequately, and it commonly short cycles (turns on and off frequently), an oversized system is ​a likely cause. An oversized system can cool the air so fast that the thermostat shuts off the system before much of the humid air has made its way across the cooling coil to get dehumidified. 
Here’s a simple test to try on your own: When it’s hotter than 80 degrees outside, turn on your AC unit, and set it to well below room temperature. Let it run for 15 minutes, then use a thermometer to check just outside the return duct (the area where air flows in to be cooled). Now take a temperature reading just outside the strongest, most easily accessible vent (where cool air should be flowing out). Subtract the second reading from the first. If the difference between these two is fewer than 14 degrees, your HVAC unit might need work. 
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The HVAC industry is a worldwide enterprise, with roles including operation and maintenance, system design and construction, equipment manufacturing and sales, and in education and research. The HVAC industry was historically regulated by the manufacturers of HVAC equipment, but regulating and standards organizations such as HARDI, ASHRAE, SMACNA, ACCA, Uniform Mechanical Code, International Mechanical Code, and AMCA have been established to support the industry and encourage high standards and achievement.
Finally, after the air conditioning unit has been properly charged, the unit should definitely cool better. There should be a temperature difference between the return and supply of 12° to 20° Fahrenheit (delta T). That range is generally acceptable for a proper delta T temperature. This dat is used to determine if your air conditioning system is operating efficiently. If you do not have this range of temperature differential with your air conditioning system then there are problems. These problems need to be addressed whether it is bad duct or a mechanical or electrical issue causing the problem. Lastly, the unit is simply not providing the cooling it needs to provide to make you comfortable.
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Finally, after the air conditioning unit has been properly charged, the unit should definitely cool better. There should be a temperature difference between the return and supply of 12° to 20° Fahrenheit (delta T). That range is generally acceptable for a proper delta T temperature. This dat is used to determine if your air conditioning system is operating efficiently. If you do not have this range of temperature differential with your air conditioning system then there are problems. These problems need to be addressed whether it is bad duct or a mechanical or electrical issue causing the problem. Lastly, the unit is simply not providing the cooling it needs to provide to make you comfortable.
The Refrigeration Loop is a closed system and refrigerant should never have to be added to the unit unless there is a leak. Most residential units use R-22/R410A refrigerant. Prices of R-22/R410A are rising every year as we get closer to the date when refrigerant manufacturers will no longer be able to make R-22/R410A. Phase-out of R-22, an HCFC, begins in 2010 and expected to be complete by 2020.). Furthermore, make sure you ask what the service company charges for R-22 when you are calling an HVAC contractor.
Some systems include an "economizer mode", which is sometimes called a "free-cooling mode". When economizing, the control system will open (fully or partially) the outside air damper and close (fully or partially) the return air damper. This will cause fresh, outside air to be supplied to the system. When the outside air is cooler than the demanded cool air, this will allow the demand to be met without using the mechanical supply of cooling (typically chilled water or a direct expansion "DX" unit), thus saving energy. The control system can compare the temperature of the outside air vs. return air, or it can compare the enthalpy of the air, as is frequently done in climates where humidity is more of an issue. In both cases, the outside air must be less energetic than the return air for the system to enter the economizer mode.
This is a very common air conditioning problem. The unit will cool for a few hours and then it stops cooling all together. The next day or several hours later the air conditioning is cooling again but for only a few hours and then the air conditioning stops again. The reason this is happening is because the air conditioning unit is low on refrigerant because you have a refrigerant leak (the unit could freeze because of a few other air conditioning problems but this is the most common reason).

HVAC repair technicians are properly qualified to take care of anything that relates to installing, maintaining or repairing your heating, air conditioning and refrigeration systems. Our professionals have gone through rigorous training and certification and all our technicians and equipment installers are NATE-certified, which involves demanding testing and indicates a solid understanding of the industry.
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