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Why Is My AC Not Cooling My House?

Your air conditioner is integral to your home health and comfort, so it can be highly disruptive when it misbehaves.

Luckily, many cooling issues are relatively easy to resolve. Air conditioners rely on a few key processes:

  • Airflow
  • Heat absorption and transfer
  • Refrigerant-based cooling

If your unit loses the capacity to manage one of those three functionalities, your home will begin feeling a little too hot. Read below for common issues that can affect your cooling capacity and how to resolve them.

A Clogged HVAC Filter

Dirty HVAC filter

The most common cause of inefficient cooling is a filter blockage. Clogs prevent the free flow of air through your unit while simultaneously causing overheating.

If your home feels warm and your utility bills have risen without explanation, this is likely a simple problem with an easy solution — clean or change your HVAC filter. Ideally, you should change your filter monthly to avoid this issue in the first place.

A Dirty or Blocked Outdoor Unit

Your condenser is responsible for condensing hot air into cool air. If it becomes clogged or cluttered with debris, your air conditioning system will lose cooling power.

Your outdoor unit needs plenty of room to function properly. It’s best to clear away debris like overgrown plants or twigs before you turn on your cooling unit for the season and any other time you notice debris that could block airflow.

Professional air conditioner maintenance will include a comprehensive cleaning, so call a professional HVAC technician to clean the outdoor unit and its internal components.

Low or Leaking Refrigerant

Refrigerant is needed to turn warm air into cool air, so when refrigerant levels diminish, your unit will lose its efficiency. If you hear bubbling or hissing noises, you probably need to replenish your refrigerant. Other signs include frozen evaporator coils and extended cooling cycles.

If your unit seems to be using more refrigerant, you might have a refrigerant leak that could be caused by:

  • Corrosion
  • Pinholes in refrigerant lines
  • Loose joints and connections
  • General wear and tear

Call your trusted HVAC repair team as soon as possible if you notice leaking refrigerant.

Compressor Damage

If your system is blowing warm air or vibrating upon startup, your compressor could be to blame.

Your compressor is one of the most important components in your system. It handles refrigerant flow between your condenser and evaporator, so if the compressor is malfunctioning, your unit will struggle to maintain your desired temperature.

Frozen Evaporator Coils

Your air conditioner’s evaporator coil is responsible for removing thermal energy and humidity from your air.

You likely have a refrigerant leak if you see ice or frost on the coil. If left unattended, this issue could lead to a complete system breakdown that needs costly repairs.

Choose SameDay for Air Conditioner Repair & Maintenance

At SameDay Heating & Air, Plumbing, and Electrical, our background-checked HVAC technicians always deliver dependable results with great customer service. We’re fast, responsive, and trustworthy, so we’ll soon restore your unit’s cooling as soon as possible when you call us for air conditioner repair or maintenance.

We even offer emergency repair service and our Priority Plus Maintenance Plan, so you can always get the service you need when you need it.

Call (801) 726-3329 or contact us online to request same-day air conditioner service today!

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