If you turn your central air conditioner on, off and then on again in rapid order, chances are you’ll blow a fuse or shut off a circuit breaker or the air conditioner simply won’t respond. Be patient and give the air conditioner thermostat about five minutes to reset. If it still won’t come on, you may have blown a fuse.
1. Locate the special fuse block near the outside unit. Pull out the block and take the whole thing to the hardware store. A salesperson can test the cartridge fuses and tell you if you need to replace them.
