HVAC Troubleshooting: What is Causing My AC’s Loud Buzzing Noise?

Why Is My AC Buzzing? Loud AC buzzing noise from an AC unit indicates stress on a HVAC system, specifically an electric issue.  It is important that you do not become familiar with the noise, and instead turn off your AC unit and call a licensed HVAC contractor. It is also important to distinguish the noise from rattling or grinding, as those sounds are a typically signs of malfunctioning parts, debris or misalignment.

Electrical

AC Buzzing noises are usually from electrical arcing – a discharge when electricity is jumping between circuitry. Loud buzzing noises indicate the electrical voltage flowing through your air conditioner is not at its correct amperage. Failing electrical components increases the risk of fire and should be diagnosed by a licensed HVAC expert to keep you and your home safe.

Motor

The motor needs to be lubricated with oil, especially in older AC units, to keep bearings from getting worn and eventually malfunctioning. A bent blade on the fan could also cause a buzzing noise. Lubricating the motor or replacing fan blades should be done before extensive use of AC (at the beginning of summer for example) to prevent a malfunctioning system later on.

Refrigerant

If a buzzing or hissing noise is coming from the AC unit itself, it could be a sign of a refrigerant leak. Refrigerant leaks cause AC units often freeze up, even during the hottest time of year when the AC is consistently on. Water dripping onto the motor will cause also an abnormal noise; the repair would involve locating the obstruction/leak and properly isolating the unit.

Parts

AC Buzzing NoisesThis is associated more with a rattling noise, but misalignment or loose screws/panels could also create a ‘buzzing’ noise. Poor installation or aged AC parts cause screws to become loose, also causing the panels on the cabinet to unfasten.

At Action Air Conditioning, Heating & Solar we care about your comfort and savings. We guarantee convenient and efficient service for all maintenance and repair calls. Did you know 90% of all HVAC breakdowns are caused by lack of maintenance?  Don’t put your comfort on hold, Call or Schedule Your Maintenance or Repair Appointment Today!

 

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HVAC Troubleshooting: Why is My AC Rattling?

When you hear your AC rattling, it is a good indicator that something has gone awry with your HVAC system. Ignoring the issue will create expensive repairs, so make sure you schedule a maintenance, tune up, or repair appointment with a licensed HVAC contractor. There are several situations that could cause a rattling noise – it could be an easy fix such as tightening screws, or it can be an indicator of malfunctioning parts which can become very expensive if gone unrepaired.

Debris

When the filter has not been changed for a while and becomes clogged, dirt, sticks, leaves, gravel and other types of debris can enter the AC cabinet and get knocked around. A dirty AC filter can cause serious damage to the AC’s parts/components along with a variety of other issues, and should be fixed immediately to prevent any more debris from entering.

Panels

Poor installation or aged AC parts can cause screws to become loose, which cause the panels on the cabinet to unfasten. This is common with old HVAC systems, which should be maintained at least twice a year.

Fan

Rattling caused by the fan within the AC unit could be from the blades themselves can becoming loose, especially in older AC models. Luckily, fan blades are easily replaceable. If the fan is misaligned due to debris or age, it will progressively get worse and eventually cause the fan to stop functioning. Dirty blades can also cause noise, so it is important to keep the blades clean and make sure your AC filter is changed regularly.

Motor

The compressor is the ‘heart’ of HVAC system, and when its parts become loose it can cause a total system breakdown. This is more common with older HVAC systems. When the noise increases from the compressor, it is usually a strong sign the compressor’s hardware needs replacing.

Installation

An unstable AC unit is a common source of rattling noise. Improper installation can cause parts to be more susceptible to damage. The noise could be from the damaged parts or by the AC unit or the platform not lining up with a window sill. Re-installation can easily fix the rattling if you notice loose/shifty parts.

Preventative maintenance can fend off unwanted repair bills and inconvenient HVAC malfunctioning during the months you use it the most. Call us today to learn more about our Precision Tune Up Program or to schedule an appointment for repair with one of our NATE-certified technicians!

HVAC Troubleshooting: Pooling Water Under Air Conditioning

If you notice a pool of water under your AC, it is a sign that your HVAC needs to be repaired or replaced. There are several things that can cause this common AC issue, so it’s important to call a certified HVAC technician to diagnose and repair the problem. 

Water is naturally created by the AC unit from the process of pulling in the hot/humid air from outside and cooling it through the unit’s cold evaporator coil. Condensation forms and that water is expelled by the drain line into your plumbing, condensation pump, or outside. If there is any issue with the parts that control this process, a pool of water will form under your AC unit. In this case, your AC is not running efficiently and could cause more expensive repairs, premature damage to parts and increased energy bills. Here are a few common causes for pooling water under AC:

  • Condensation pump – When the water is not expelled properly due to a faulty condensation pump, the continual presence of water in an AC unit will create mold and mildew build up and cause the system to clog. This is important to repair in a timely manner to prevent a snowball-effect of other problems because of a clogged unit.
  • Blocked drain hole – If condensation/water is not able to exit the unit due to a clogged drain hole, the water will have nowhere else to go but inside your home or pool around the unit. A clogged drain hole is caused by dirt, insects, debris or mold/mildew build up inside the unit. It could also be from a dirty evaporator coil in which case the dirt will mix with the water and fall down into the drainage pan, clogging the drain hole.
  • Frozen evaporator coil – Low refrigerant causes the coil to become much colder than necessary, in turn freezing it. A dirty air filter will also cause the coil to freeze from the lack of airflow. To defrost the coil, turn your AC off and call a licensed HVAC contractor to correct the problem.
  • Bad sealing – If the seals on your AC unit are not tight, it will cause an excess of air inside. The moisture from that air will build up when the warm air meets the cold air inside the AC unit. A HVAC contractor will need to reseal the outside of the AC to keep it properly isolated.
  • Poor installation – This is common with newly installed AC units. The problem of pooling water happens when condensate trap is not installed correctly, which will prevent the water/condensation from properly draining.

Action Air is dedicated to your home’s comfort and energy savings. If you are experiencing pooling water under your AC, call Action Air to schedule an appointment with one of our Nate-Certified technicians.

How to Keep Your Home’s Air Conditioning Working at Peak Performance

Preventative maintenance can save you big during the months where your AC/Cooling system is running constantly. Summer is the busiest time of the year for HVAC contractors, and with the rebates currently offered for a quality maintenance appointment, now is the best time to schedule your system check-up.
When you schedule a Quality Maintenance appointment, our NATE Certified home comfort specialist will do a thorough check up of your entire system and all equipment including:

  • Cleaning condenser coils
  • Evaluate coolant levels and pressure
  • Adjust thermostats
  • Compressor amps at start up
  • Inspect and lubricate motor, blower belt, fan and blades
  • Change air filter
  • Check condensation drain
  • Examine outdoor disconnect and all ductwork
  • Tighten electrical components (wiring, contacts, capacitors, and relays)

Many homeowners do not realize their HVAC system needs repair until a total breakdown occurs. For the small cost of an AC tune up, it can be a huge return on investment.

Benefits you will receive from an AC tune up:

  • Enhanced system performance
  • Increased HVAC lifespan
  • Reduced energy costs
  • Prevention of costly repairs or breakdowns
  • Improved air quality
  • Safe home or work environment
  • Peace of mind!

Take advantage of Action Air’s NATE-certified technicians, professional and convenient services, and low prices today! Call the Experts 800-400-4152 or submit your appointment request online to schedule your AC tune up or Quality Maintenance appointment.