The thermostat is the heart of the air conditioning unit. Any damage to the thermostat can lead to the malfunctioning of the air conditioning unit. It is a must that you keep a constant check o the thermostat or ask a technician to do so for you. A programmable thermostat can ?pay for itself? in just a couple of seasons, albeit depending on the temperature schedule that you opt for. If the thermostat setting is ?on?, its fan will continually run. If the setting is set on ?auto? mode, the air conditioning unit's fan is activated only when compressor is activated or during the cooling cycles.

Electromechanical thermostats make use of a miniature glass vial, which contains a narrow piece of bi-metal coil and mercury. The bi-metal coil is very sensitive to temperature fluctuations. It contracts when it gets cold and expands when it gets warm.

One way of protecting your air conditioner's thermostat is by protecting it from any tampering or undue damage with plastic AC thermostat covers. Most plastic covers for thermostats are easy to use. They can fit to almost all thermostats.

The proper calibration of an air conditioner thermostat is essential for its consistent output and efficiency. If the thermostat of your air conditioner is faulty, ask for professional help to get the problem sorted out so that the thermostat works at its optimum level. To ensure that the thermostat is functioning properly, regularly check its calibration for accuracy.

To verify this, tape a thermometer just a few inches from your air conditioner thermostat. The thermometer though, must not touch the wall. Ensure this by padding it up. Compare the readings of both thermometers - let the thermometer stabilise for at least 15 minutes first though.

If the air conditioner's thermostat reading is off by a few degrees check if it has become dirty. Remove any foreign particles inside it by opening it.