While bills typically fluctuate by a few dollars each month, a significant increase in your energy bill means your AC unit isn't working efficiently.
It's not normal whether you hear knocking, screeching, rattling, or something else. Loud noises can mean loose parts, which can cause significant damage if left untouched.
As you walk around the house, do you find places that feel hot and other areas that feel extremely cold? The uneven temperature could be a problem with the insulation or it could mean that there is a problem that requires the AC to be repaired
A leaking AC should be fixed right away, as the water can cause mold or mildew problems. If you have water leaks inside your home, the AC condensate could be faulty.
If you can feel cool air when your hand is near the vent, but realize you're not blowing hard enough, you may have a problem with your motor or fan.
Yes, during the summer, indoor humidity can rise. But a constant sticky feeling could be due to duct leaks or a problem with your air conditioner
If air is coming out, but it's not cool, you may have a problem with the refrigerant in your air conditioner
A frozen coil can happen due to something simple, like dirty air filters, or due to something more complicated, like a coolant leak
If your drive randomly starts for a few seconds only to turn back on, there is a problem with your cooling system. An experienced HVAC technician can find the source of the problem