Issues with the sensor. Behind the control panel is where you will see the thermostat sensor. Its main function is to measure the temperature of air entering the evaporative coil. In the event the sensor gets misplaced, the unit has the tendency to malfunction. In a similar scenario, it will be best to return the sensor carefully to its original position.

Wailing noise. When the air conditioner begins to howl like a banshee, check the fan belt. A dislodged one might be causing the ear-splitting noises. Try restoring the fan belt where it should be rightfully placed. That might stop the noise altogether. While you’re at it, check the bearings in the motor as well and see to it that they’re sufficiently lubricated.

Stops working. There might be times that the unit suddenly ceases to function or might not even turn on. When this happens, check the fuse and circuit breakers. Also, adjust the thermostat to cool and below room temperature. In addition, turn on the switches of the condenser power and furnace power.

Unpleasant odor. Since most air conditioners go through the constant process of warming and cooling, they tend to create moisture rapidly. Not enough evaporation gives fungi, molds and other organisms the opportunity to dwell in the unit. Change the filters regularly to avoid such problem.

Blocked grilles. Blocked grilles are one of the most common issues of air conditioners. By cleaning the unit’s parts carefully, it will be able to function normally again. Start by wiping the fan, motor and fins. Make sure not to wet the electrical parts. Also, be extra careful when removing the top grill because it might be wired to the fan.

Electric control failure. During professional servicing, see to it that all electrical connections and contacts are properly examined. Most oversized units cycle on and off, which allows the fan controls and compressors wear out sooner. In addition, when the outer fan ceases to run, the compressor tends to overheat, causing damage to the unit.

Leaking refrigerant. A leaking refrigerant can be explained by two reasons. First, it could be undercharged during installation. Second, the air conditioner simply leaks. Keep in mind that leakages can’t be fixed just by simply adding another refrigerant. In such case, it’s more apt to seek assistance from a technician who will then fix the entire issue. Most air conditioners function at its best when the amount of refrigerant exactly fits to the manufacturer’s specifications. Be well aware that undercharging and overcharging can dramatically affect the air conditioner’s performance.

To avoid such HVAC construction problems, it would be prudent to invest in regular servicing. Routine maintenance help detect any faults that will affect the unit’s overall performance.

(This article was supplied by Brivis Climate Systems Pty Ltd.)