How to Keep Your HVAC from Overheating

How to Keep Your HVAC from Overheating

Overheating HVAC components can put your heating or cooling system out of action and may impose expensive repairs and/or replacement. While internal safety shut-off switches may prevent the most severe damage — including possible fire hazard — you’re still left without heating or cooling in your home, often at the most inconvenient time. Here’s how a qualified professional service technician may resolve issues associated with overheating HVAC components:

  • Is the filter clogged? A dirty, clogged air filter can restrict system airflow to the point where critical components like the furnace heat exchanger or the A/C compressor overheat. Check the filter monthly and change it at least every other month during the heating season and every month in the cooling season.
  • Are too many vents closed? There’s a limit to how many air vents in a house can be closed (or obstructed by furniture or other objects) before heat damage may occur. Proper system airflow depends on open vents. If they’re shut or obstructed, the lack of air circulation can cause system overheating, not to mention seriously degrade indoor comfort. For the best results and protection of system components, all supply and return vents in the house should be open at all times.
  • Is the fan fully functional? An HVAC blower fan that is wearing out may not circulate sufficient air volume to counteract excessive heat accumulation during furnace operation. This, in turn, can damage the heat exchanger, a critical safety component in the furnace. A service call by a qualified HVAC technician can reveal and repair common issues with the blower fan.
  • Is the A/C overheating? One cause of damaged compressors in central air conditioners is low system refrigerant. When the refrigerant level drops below specs, ice may form on the indoor evaporator coil and eventually block all airflow. This may cause the A/C compressor to overheat and incur permanent damage. Refrigerant leaks require professional service to pinpoint the location and repair the issue properly.

To avoid the expensive consequences of overheating HVAC components, contact the experts at Aggressive Mechanical Contractors, Inc., serving Neptune and the surrounding areas since 1948.

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