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Air Conditioner Repair Guides
Troubleshooting and how-to guides for your air conditioner, written from manufacturer instructions. Start with the easiest check in each guide and stop where it says to call a pro.
- 6 guides
- Safety notes in every guide
- Checked against manufacturer sources
- How to Reset a Mini-Split AC: Breaker, Button and Remote Fixes
The standard mini-split reset is a power reset: turn the unit off with the remote, switch off its breaker or outdoor disconnect, leave it off for about 20 minutes (Carrier's figure), then restore power and give the compressor 3 minutes to start.
- How to Clean Mini-Split Filters: Step-by-Step for Wall Units
Switch the unit off, lift the front panel, slide out the mesh filters, vacuum or wash them in lukewarm water with mild detergent, and let them dry completely in the shade before you put them back.
- Heat Pump Not Heating? Settings, Defrost and Fixes to Try
A heat pump that seems to stop heating is often just in its defrost cycle, which Trane says usually lasts 3 to 5 minutes and can send cool air or steam out of the outdoor unit.
- AC Leaking Water Indoors? 6 Causes and How to Fix Each One
An indoor AC unit that drips is usually dealing with condensate that can't drain away: a clogged drain line, a coil that froze because the filters are dirty, or a unit or drain hose that isn't sloped correctly.
- AC Freezing Up? Why the Indoor Coil Ices Over and What to Do
An AC that freezes up almost always has too little air moving across the indoor coil, and a clogged filter is the first suspect.
- AC Blowing Warm Air? 8 Causes and What You Can Fix Yourself
Warm air from an AC is most often a wrong mode setting, clogged indoor filters, or an outdoor unit that has lost power or stopped.