How to Diagnose Problems With Home AC Systems
The air conditioning system in your home is used to keep it cool on hot summer days. When the system is not working properly you will need to find the cause of the problem. This will require a series of tasks to make sure each part of the system is working correctly, followed by the proper repairs.
- Verify that the thermostat is set to "Cool" if the air conditioner is not coming on as expected. The unit will not turn on and blow cold air is the thermostat is set to "Off."
- Make sure that the temperature setting has not been changed or reset. Adjust the temperature for the air conditioner to come on, if necessary.
- Open the circuit panel and see if a breaker has been tripped or if a fuse has blown. Turn the breaker back on or replace a blown fuse to correct the problem.
- Turn off the power to the air conditioner. Remove the front cover and examine the air filter. If the filter is dirty or clogged with lint it will restrict the flow or air. Replace the old filter with a new one.
- Visually inspect each register for your heating and air conditioning system. Verify that each register for your home is open. Move any furniture or obstructions out-of-the-way if they are blocking a register.
- Examine the outside unit for your air conditioner and see if there is ice buildup or frost on the line. The presence of frost or ice indicates that the line is not properly insulated.
- A delay can occur with the air conditioner turning on if the differential setting is more than 2 degrees.