AC parts break down over time. However, an improperly maintained central air conditioning system will put pressure on every part of that system. A dirty filter that hasn’t been replaced, fans that are not cleaned, leaking refrigerant, exposed wires in the electrical box, ice build up on coils. These put pressure on the capacitors, sensors that track heat levels and thermostat readings and generally weaken the unit so it does not run efficiently and any part can break down.
