If you notice either of these, you’ll need one of our expert technicians right away. Commonly, people notice that their air conditioner has a musty smell.(Image: [[https://p0.pikist.com/photos/458/883/ac-service-in-india-ac-repair-ac-amc-thumbnail.jpg|https://p0.pikist.com/photos/458/883/ac-service-in-india-ac-repair-ac-amc-thumbnail.jpg]]) This can happen when the water in the drain pan or drip lines starts accumulating. Consequentially, fungus and/or mildew can start to grow in your system.(Image: [[https://p0.pikist.com/photos/693/61/car-engine-tuned-engine-ac-cobra-engine-car-motor-engine-tuning-mechanic-repair-thumbnail.jpg|https://p0.pikist.com/photos/693/61/car-engine-tuned-engine-ac-cobra-engine-car-motor-engine-tuning-mechanic-repair-thumbnail.jpg]]) Homeowners should first check the circuit breaker and reset it if necessary. They should also check the thermostat batteries and get them replaced if needed.[[//www.youtube.com/embed/https://www.youtube.com/watch?v=XmR6Dz3tKzQ|external frame]]