Mini-split problems, lifespan and upkeep
A mini-split is a ductless heat pump: an indoor head on the wall connected to an outdoor unit by refrigerant lines. Most trouble comes from dirty filters, the remote's settings, a clogged condensate drain, or the outdoor unit. The room may be not cooling or heating, or the head may be leaking water. Because it's a heat pump, the heat pump not heating and heat pump blowing cold air pages apply too. Refrigerant work always belongs to a certified tech.
- Mini-split not cooling or heating?The mini-split runs but the room doesn't cool or warm, which is usually dirty filters, the wrong remote mode, or a blocked outdoor unit.
- Mini-split leaking water?Water drips from the indoor head, which is usually a clogged condensate drain line, a kinked hose, or a coil that froze and is thawing.
Typical lifespan: varies with the make, the climate and how well the filters and drain are kept up; a well-kept unit can last many years
Signs it is near the end:
- Repairs are getting frequent, or a single repair costs a large share of a new unit.
- The room is slow to cool or warm even with clean filters.
- Error codes keep coming back after a power reset.
- The coil keeps icing up or the refrigerant keeps leaking.
- Open the front cover and clean the filters when they collect dust.
- Keep leaves, snow and debris off the outdoor unit.
- Check that the drain hose isn't kinked and drains freely.
- Keep the manual handy: the blinking-light error codes are listed there.
- FurnaceFall
The furnace runs but the house stays cold, which is usually a clogged filter, a thermostat setting, or an ignition fault.
- Heat pumpFall
The heat pump runs but the house stays cold, which is usually thermostat settings, a clogged filter, or an iced-over outdoor unit.
- Washer
Water is left in the drum after the cycle, which is usually a clogged pump filter or a kinked drain hose.
- Fridge
The fridge section is warm or warming. The cause depends on whether the freezer is still cold, and the first fix is often free.
- Washer
The drum fills and washes but won't spin, which is usually an unbalanced load, the lid switch, or a drain problem.
Diagnose your mini-split in seconds, for free
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Snap one of these:
- the indoor head with the front cover open, showing the filters
- the remote's screen
- the outdoor unit
- where water is dripping
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