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Summertime HVAC Troubleshooting: Why is my A/C Blowing Warm Air?

It’s no fun going without proper cooling during the summer months in the Bay Area. Fortunately, air conditioning units are pretty reliable for a number of years, providing your home with refreshing cooled air to keep you and your loved ones comfortable. But sometimes, things go wrong, and one of the most common concerns people may ask about is why their A/C unit is blowing warm air.

If you’d like an overview of reasons why your unit might be blowing warm air before you call in an HVAC professional, then we’ve got you covered. Here we outline some of the most common reasons that your A/C may be blowing warm air, rather than cold air.

The Thermostat is Set to “Heat” or “On”

It sounds obvious, but oftentimes homeowners will wonder about the air coming from their vents being warm, without checking the temperature setting on their thermostat. Do this first before anything else. You may have accidentally set your system to have the heating unit kick-on, in which case, it’s probably working just as it should be. It also could be set to the “on” function, which will cause the system to blow uncooled air while the outdoor unit isn’t running.

Refrigerant Leak

Refrigerant acts as a cooling agent in A/C systems by absorbing heat from the air, which in turn provides you with “conditioned” air. If your refrigerant gets low, that means there is a leak. Check your outdoor unit for a frozen refrigerant line, or for any unusual noises. If it’s making a hissing noise, then the leak is probably pretty major. If you notice these signs coming from your A/C unit, then it’s time to call in a professional to find and repair the leak as well as replace the lost refrigerant.

Restricted Air Flow

If you haven’t replaced your HVAC air filter in a long time, or, if you haven’t had maintenance performed on your A/C system this year, then you could be dealing with restricted air flow. This type of issue can result in too little air coming from the vents, which can seem as though the unit is blowing warm air. Improper air flow can also cause other major issues for your home’s cooling system, which could cause your outdoor unit’s compressor to stop functioning.

Faulty Ductwork

A less common cause of an A/C unit blowing warm air is a faulty return duct, which could be either disconnected or broken. If this happens, then the return duct is pulling in air from either the outdoors, or from a warm attic space. If this is your issue, you’ll need to call in a professional HVAC technician.

Need Professional Help? Call us Today!

Aside from your thermostat being improperly set, if you notice any of the above issues with your A/C unit, then you’ll want to seek the help of a certified HVAC professional.

ACS Air Conditioning Systems has been helping Bay Area residents with their cooling needs for over 40 years, offering professional service to satisfied customers. Call us today to schedule an appointment with one of our highly skilled technicians: (925) 270-1613.

Things To Consider When Replacing HVAC Heating And Air Conditioning Systems

87701128There is no point overreacting every time one of your HVAC units shows some signs of malfunction. As you may already know, annual servicing of your system is a must to ensure that the unit is performing at its peak condition and is not using up too much energy. However, even with periodic servicing, some problems may occur which can be solved by repair or replacement of some worn out parts.

However, a point may come when you know that your system is already enough old and is well past its better days. This is when the conundrum appears. You feel uncertain about whether to go for another repair or chuck the unit for good. Now, if the system is really too old, there is little wisdom in continuing spending money on it in the form of recurring repairs or servicing.

There are some common indicators which tell you that a replacement is necessary. The obvious one is that when you see your utility bill is spiraling out of control every succeeding season. Also, if you notice that the system is leaking water or fluids, this is directly related to higher energy consumption and getting a new unit will be the best decision under such circumstances.

Also, if you notice that your system is regularly making unusual, disturbing noises when you are trying to set the thermostat as well as at other times, you may be fairly certain that a replacement is your best option. Another important thing is that when you are running a faulty system, you are also exposing yourself to a good amount of risk due to possible air contamination.

We would also like to stress something that even many HVAC specialists forget to mention when it comes to HVAC system replacement, which is that if you are replacing one of your HVAC units, you must also replace the other, too (unless the latter is fairly new). For example, replacing a malfunctioning furnace while keeping an old AC unit (or vice-versa) would cost you more in the long run. Also, if you buy the pair as a unit, you may avail some lucrative discount and will also have to pay only a one-time installation cost.

For more articles that will keep your heating and cooling systems running efficiently, follow our upcoming articles on this blog.

What Does The Air Handler Do For My HVAC System?

man repair air-conditionerYour HVAC system consists of numerous components working together to maintain a comfortable indoor living environment. The air handler is responsible for regulating and circulating hair. It contains the system’s blower, evaporator coil, sound dampers, filter racks and other parts of the ventilation system.

An air handler houses all the components necessary to circulate air throughout the building. It connects to the ductwork and provides cooling, heating or both depending on where it is installed and its application. An electric motor provides power to the blower, which may operate at one or more speeds, depending on the unit. Flexible vibration isolators installed in the ductwork on either side of the air handler block the transmission of noise and vibration through the ductwork.

The handler contains filters to ensure treated air blowing into the building is clean. When the filters become clogged with dirt and debris, they obstruct airflow through the handler. At the same time, the evaporator coil accumulates dust. This can cause the air conditioner to freeze up and lead to other problems. Changing the filters as part of a regular maintenance routine will increase the efficiency of the HVAC system and extend the life of all components.

Hiring a professional to maintain your air handler is the best option unless you are familiar with the equipment and the proper methods for taking care of it. The handler is attached to liquid and suction lines that are easy to crimp or bend if you are not careful. The coil fins are also extremely delicate. If bent, airflow across the coils is compromised.

Part of routine maintenance should include checking the condensate lines for clogs. The evaporator coil condenses moisture it draws from the air. The moisture drips into a condensation pan and drains through a PVC line to the exterior of the building. If the PVC tube is clogged with debris or algae, the HVAC technician can flush the line. Treating the condensation lines and evaporator pan with algaecide can prevent the growth of algae.

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