What are the signs of a failing thermostat?

A failing thermostat can lead to inconsistent temperatures within a space. This occurs because the thermostat is responsible for regulating the temperature by signaling the heating or cooling system to turn on or off according to the set temperature. When a thermostat malfunctions, it may not accurately read the ambient temperature or may fail to send the correct signals to the HVAC system. As a result, the environment can become too hot or too cold, leading to noticeable fluctuations in temperature.

In contrast, low refrigerant levels typically affect the cooling performance of the air conditioning system but do not directly relate to thermostat functionality. Similarly, dirty air filters may hinder airflow and system efficiency but are not indicative of a thermostat's operational status. Increased power consumption may suggest other issues related to inefficiencies in the system rather than a failing thermostat specifically.