Normal Functioning of Your HVAC Fan

The fan within your HVAC system should operate in sync with your heating and cooling units. It’s typical for the fan to engage a few minutes prior to the commencement of heating or cooling and to continue running briefly after the system shuts off. However, continuous operation of the fan independently from the heating or cooling system indicates a potential issue.

Indications of Underlying Problems

If your fan is running constantly, don’t worry too much, this problem will not cause any further harm. Instead, it points to more significant issues. Potential culprits include:

  • Faulty Thermostats: Malfunctioning thermostats may fail to properly regulate the fan’s operation.
  • Electrical Issues: Problems with wiring or stuck relays can prevent the fan from turning off as it should. If only the fan is running, a broken relay switch or short circuit might be the problem, preventing the fan from receiving the correct on/off signals from the thermostat.

These issues are complex and generally require the expertise of a professional HVAC technician. But before you call a professional here are some things to consider first:

Thermostat Settings: Verify if your thermostat is set to “on” rather than “auto.” This simple setting can cause the fan to run continuously.

Extreme Weather Conditions: During periods of intense heat, your HVAC system may struggle to reach the set temperature, particularly if the system is undersized or hasn’t been properly maintained. In such cases, the system will continue to run until the outside conditions become less extreme.

How Your Fan Should Work

Your HVAC fan is an essential component that works in conjunction with your heating and cooling systems but operates on a distinct electrical circuit. The furnace or air conditioner is responsible for modifying the temperature of the air, while the blower fan circulates air through the system and into your home. The thermostat coordinates these operations, ensuring that the fan and heating/cooling systems turn on and off together when set to “auto.” This synchronized operation helps maintain a comfortable indoor environment. Your HVAC system has a big job to do, and your

Importance of Regular Maintenance

 Your HVAC system has a big job to do, and it’s your job to take care of it. Preventative maintenance is crucial for avoiding HVAC issues. Scheduling routine tune-ups with a trusted service provider like On Demand Heating & Cooling can help identify and address minor problems before they escalate. Regular maintenance not only improves efficiency but also extends the lifespan of your HVAC system, saving you money in the long run.

When to Call a Professional

If your HVAC fan is running continuously, it’s advisable to seek professional help promptly. Attempting to fix electrical issues on your own can lead to further damage or even pose a fire hazard. On-Demand Heating & Cooling offers emergency repairs, as well as routine maintenance. Our team of experts is always ready and available to assist with any HVAC concerns.