Common Problems That Cause Your HVAC to Fail

A heating and cooling system is made up of various components that need to work together to maintain year-round comfort. One of the benefits of an HVAC system is that it can last for many years by taking advantage of the multi-family HVAC service in Dallas, TX, we provide that includes routine maintenance and repair work. It’s equally important to be mindful of some of the common problems that may cause an HVAC system to fail so you can be proactive and call on us before urgent repairs are needed.


Even a small leak will cause a system to work harder to maintain the desired level of comfort. Refrigerant leaks, in particular, can make it difficult to cool spaces since this liquid is needed for condensers to produce the cool air that flows through ducts. Signs of a leak include:

  • Warmer air coming from vents when the system is on in the summer months
  • Ice building up on copper lines from the AC unit
  • Higher than usual utility bills
  • Low airflow from vents

Drainage Problems

The condenser pump on an HVAC system sometimes breaks. When it does, water will pool instead of drain normally. If the main part of your HVAC system is set up in a basement or another out of the way location, drainage issues that go unnoticed can lead to significant water damage.

Dirty or Clogged Filters

Filters on an HVAC system are working year-round since any air that circulates in a home is filtered, whether it’s warm or cold. Dirty or clogged filters will make a system work harder. If ignored, the problem could shorten a system’s lifespan by placing excessive wear and tear on blowers, fans, motors, and other equipment.

Quick Tip: Consider washable HVAC filters. They can last about 5-10 years with regular cleanings.

Electric Control Failure

An HVAC system operates in cycles that continue throughout the year. Because of all of this use, wires may slowly wear or become corroded or frayed. In some cases, wires simply become disconnected. Signs of a problem with the wiring that controls cycles and other system functions include:

  • Stuttering when cycles begin
  • Occasional shutdowns (even if the system eventually restarts, it’s still an issue that shouldn’t be ignored)
  • Unusual odors coming from the motor (suggests wires are burnt)

Blower Problems

Blowers are what pushes cool and warm air through ducts and into vents in various rooms. The most obvious sign of blower problem is hearing the motor come on but not feeling any air. If something is stuck in a blower, you may hear a rattling sound. A blower that’s clogged with dirt or dust can still work, but there will be a noticeable reduction in airflow.

Sensor Malfunctions

The thermostat sensor is what detects air temperature and signals the HVAC system that’s it’s time to turn on or off. A malfunctioning sensor may place excessive wear on a system and contribute to early failure. Sensors that aren’t working properly may result in:

  • Failure to maintain the desired temperature
  • Cycles that run irregularly
  • Rooms that are too hot or cold

When you’re in need of multi-family HVAC service in Dallas, TX, J National is the company you can trust to get the job done right the first time, every time. Our experienced, licensed and insured contractors are available throughout Dallas and the surrounding areas. Give us a call for more information on our multi-family property and commercial services.


Write a Reply or Comment