If your air conditioner is hit by a power surge during a storm, some of the electrical parts may be damaged. This could result in your AC not turning on at all or turning on but not cooling your home very well. If your AC isn't working right after a storm, it's a good idea to call an AC repair service and have your equipment checked. Here are a few things that could go wrong and the AC repairs that could be needed.
1. A Fuse Blows
The power to your AC unit comes from the electrical panel on your home and passes through the disconnect box that contains fuses. Power passes from the disconnect box to your condenser and the parts inside. When a fuse blows, the transmission of power stops and your air conditioner will be dead.
An AC repair technician can use a multimeter and trace the power supply from the condenser all the way back to the electrical panel to find out where power was interrupted. If a fuse blew, the repair technician can replace it easily to get power flowing to your AC again.
2. The Control Board Burns Out
Your central AC system has a control board in the air handler that controls just about everything in your air conditioner. If the control board is fried by a power surge, the thermostat won't be able to communicate with the condenser or air handler and your AC won't turn on.
A bad control board has to be replaced. Replacing it isn't too difficult, but it's tedious work since there are so many wires that attach to it and these all have to be pulled off and then attached to the right places on the new control board.
3. A Capacitor Is Ruined
Your air conditioner has two capacitors. One boosts power for the condenser fan and compressor motors and the other provides power to the blower motor. These electrical parts can be damaged during a power surge. When the capacitor doesn't work, the motor it powers can't get the energy it needs to start up the equipment. The blower or condenser fan may not work, and that means your AC won't be able to cool down your house.
A capacitor is an easy part to replace, so it's a quick AC repair. The repair technician just has to pull out the old capacitor and put in a new one of the same type so the motors can start normally again. The AC repair technician will also check the motor to make sure it wasn't damaged when the capacitor stopped working. If the motor is bad, it has to be replaced too.