ac_unit
Cooling
Pick the equipment that’s acting up. We then rank the likely causes — free, safe, common checks first.
ac_unit Central air conditioning
Split-system cooling: outdoor condenser + indoor coil.
heat_pump Heat pump
One machine that heats and cools — hence it lives on two shelves.
ac_unit Ductless mini-split
A wall-mounted ductless heat-pump/AC head and its outdoor unit.
thermostat Thermostat
The wall thermostat that controls your heating and cooling.
ac_unit Window & portable AC
A window-mounted or portable room air conditioner.