Your AC depends on the thermostat to control your cooling and heating. However, when your vents blow warm air in the summer, your thermostat could be the issue; it may not be able to accurately read temperatures. Therefore, it is vital that an HVAC professional assesses your unit and repairs the thermostat to prevent system dysfunction. Below are the indicators that your appliance's thermostat is defective. 

AC Unit Won't Start

A thermostat includes a series of wires with marked terminations. Over time, these wires will deteriorate, breaking the power connection between the AC and the thermostat. In addition, an accumulation of dirt and debris on the electrical components can hinder the wires from making contact. When your AC cannot detect the temperatures, it will not start. If this is the case, an AC technician must fix your thermostat. They will tighten the terminal screws and replace the frayed wires for the effective current passage to power the system.

AC Running Continuously

If there is a malfunction, your AC will continuously run even if it has attained your thermostat setting. If the cool-mode switch is off, but the circulation fan is on, your system will continue to run. Moreover, since relays start the AC by opening and closing electrical circuits, if they wear out, they may stick together. This causes the system to continue operating even if you turn off the unit. Therefore, you should hire an AC contractor to replace the worn-out relays and ensure that the fan setting is auto.

The Thermostat is Unresponsive

If your thermostat isn't responding well to temperature changes, it could be due to the proximity to not only sources of heat but also humidity. When a thermostat is installed in a poor location with significant temperature fluctuations, it will fail to regulate the temperature accurately. Furthermore, the thermostat will not function if the batteries are dead. Contacting an HVAC specialist is vital to ensure they place the thermostat at an ideal location and replace the batteries for a prompt response to settings.

Short Cycling Or Turns On and Off Too Frequently

Your AC will continue to run without attaining the desired temperatures if it does not complete the full heating and cooling cycles. This is because the thermostat is overheating due to an electrical malfunction. Moreover, if you have a poorly calibrated thermostat, the cooling cycles will be shorter due to the shorter length of the anticipator's arm around the dial.

A defective thermostat will reduce the system's efficiency and consume a lot of energy resulting in high electricity bills. Therefore, you should contact an HVAC repair expert to optimize your AC's performance by cleaning and replacing worn-out parts for a reliable operation.

Contact a local HVAC service to learn more about AC repair.