Check if there are any grounds in the electricity
Like any other machine, aircons need energy to run. And the energy they run on is electricity. Should you have a ground in your current, that could be a big problem. Some machines have surge protectors to prevent them from spontaneously combusting and catching fire. But, it can only cushion so much of the electrical surge before bursting into flames and setting your house on fire. So, check your electrical currents. Check if your house can handle the load without exploding. It will not only help you save money but also save your life.