Air conditioning (main) : Heating & Cooling articles : Ducted Air Troubleshooting

Ducted Air Troubleshooting

With proper maintenance, your ducted air conditioning system should run for years without any problems. If something does go wrong, this troubleshooting guide will point you in the right direction before you call in a pro .

Problem: no air

If you switch on the central unit and nothing happens, the problem could be as simple as a blown fuse. Check your home's fuse box and reset any blown circuit breakers.

Try setting your thermostat to its lowest setting. If the unit still doesn't turn on, your thermostat might be broken and will need to be replaced.

No power can also be a sign of broken or faulty wiring. Call an electrician or heating and cooling specialist to inspect your installed system.

Problem: warm air

If your air conditioner is blowing air but it isn't cool, the problem could be due to a blocked air filter. Check your cooling system's manual for advice on how to clean or replace the air filter.

Otherwise, the problem might be a lack of refrigerant. Call an air conditioning contractor to replace the coolant and check for leaks in the refrigerant system.

A frozen air conditioner is another cause of warm air. This can happen during extended periods of use. Open the unit and check if any ice has formed inside. If so, turn the power off and let your system defrost for a few hours.

Ducted air troubleshooting

Problem: not cooling all rooms

If your ducted system is cooling some rooms but not others, you most likely have duct leaks.

Check the ducts leading to those rooms that aren't cooling properly, and repair any leaks.

Problem: noises in the night

Some air conditioners are noisier than others, but if your system suddenly starts making more noise than usual, it could be due to a broken fan. Turn it off straight away to avoid any more damage, and call an expert in to inspect it.

Need more help? Get a quote for professional air conditioning repairs.

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