Repairing a damaged air conditioner costs an average of $350, with most homeowners spending between $175 and $550. However, depending on the nature of the problem with the system, the cost might be substantially higher.
There are a few things you should check before calling a professional if your air conditioner isn't working. Before you make the call, go over this checklist; it might save you some money.
Make certain the thermostat is actually set to “cool.”
Be sure the temperature is set to below the current room temperature.
Check for a tripped circuit breaker or blown fuse.