If you are having trouble with your HVAC unit, the problem could be with the thermostat. While the thermostat will often continue to operate, it can impact heating and cooling. Here are some signs that your thermostat may have stopped working and needs replacing.

HVAC Unit Will Not Turn On

An HVAC unit that will not turn on is a common sign the thermostat could be malfunctioning. The issue commonly comes from faulty wiring, a bad battery, or corrupted internal components. Try replacing the battery. If that does not solve the problem, turn off the power to the thermostat from the breaker and remove the cover. Inspect for any loose wiring. If there are components that appear dirty, clean them with a soft cloth. You will want to replace a thermostat with heavily corroded parts or wires.

Short Cycling or Constant Running

Short cycling occurs when the HVAC unit turns on and off too often and does not complete its full cycle. A short-cycling system decreases energy efficiency.

This issue usually stems from the compressor. Other times, the problem is with the anticipator, which is located in the middle of older thermostats. Move the needle on the anticipator to lengthen the cycles. Be sure to let the unit run a full cycle before adjusting.

A broken thermostat can also cause your HVAC unit to run constantly, which means it could need recalibrating. Other causes of a unit constantly running or cycling include poor wiring, an uneven unit, or a thermostat that is not set to the “auto” function.

Unit Will Not Respond to Settings

Adjusting the settings on the thermostat should take effect immediately, and your thermostat should keep the settings. Most HVAC units accept the changes and start the unit by making a clicking noise or another sound. If the thermostat keeps forgetting these settings, you may need to replace it.

If the unit still is not heating or cooling, ensure the battery is not weak. Lower the temperature by 5 degrees, and listen for the click.

Fixing a thermostat is not always possible, and you may need to install a new one. If you do not know how to install a thermostat or the unit still fails, contact Crest Air in Palm Beach right away. Our skilled team can also help with heating and cooling repairs, installation, and maintenance.

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