Once it’s clean, check for obvious problems with the components, like loose wiring or terminal screws that need to be tightened. A coating of debris on the mechanical and electrical components can affect a thermostat’s normal operation, so clean them carefully with canned compressed air or a soft brush. First, check for a buildup of dirt, soot, cigarette smoke or dust. If you’re certain it’s receiving power, shut off the thermostat breaker in order to safely take off the cover and examine the inner components. Look for and address simple reasons why the thermostat isn’t getting power, such as dead batteries or a tripped breaker or blown fuse in your main electrical service panel. If it is not, the thermostat cannot signal the air conditioner to cycle on. The Air Conditioner Suddenly Stops WorkingĬheck whether the thermostat’s display is lit.
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Learning how to troubleshoot these issues can help you avoid an unnecessary and costly service call. Since the system’s functionality is affected, it is easy to misinterpret the symptoms as urgent HVAC equipment troubles when a simple fix at the thermostat may be all that is needed.Ī faulty thermostat may be to blame if the air conditioner short cycles and runs almost nonstop, the living space seems warmer than your desired temperature setting, or you suddenly experience a cooling system failure. Most thermostat malfunctions cause subtle or sudden changes in the performance of your cooling system. When thermostat problems develop, they are rarely dramatic events with sparks flying, or where smoke alarms sound. Minor thermostat problems can mimic more serious issues with the HVAC system and directly impact cooling system performance and comfort.
Any change in air conditioner performance is worrisome, but before calling a cooling expert, check the thermostat. A well-functioning air conditioner is essential for home comfort in Sarasota’s hot, humid climate.
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