Don’t you just adore the sound of that air conditioner of yours on a boiling afternoon? A quick hum starting out, as well as the knowledge that you will be cooler with that AC coming out of the air conditioning vents any moment. Then the constant hum of the outside heating and AC component as it continues producing that cold air. However, what would happen if that correct hum no longer sounded? If your AC stopped finally working, as well as that hum is gone. I would first check the thermostat to ensure no child of mine played with it while I was out. I would verify that the “cooling mode” was correctly indicated on the thermostat. If all is well at the thermostat, I would then head onto the electrical box. If there had been a power surge during our absence from home, the breakers might need to be flipped off as well as back on again. I would not forget to check the air filter at this pressing time, just in case of a noticeable clog within the ductwork. If still, that correct AC hum is not heard, I would double-check the outside heating and AC component to ensure that no tree limb had fallen on our unit. If it is all clear on the outside air conditioning equipment, I would have to call for an immediate heating and AC maintenance appointment. In this heat, I cannot sit only to sweat as well as feel irritated in our own home. Then my hubby and I would have to go out to the films to get some much-needed air conditioning until our AC service professional arrives.