Residential cooling equipment whose installation type has not yet been identified as central, portable, window-mounted, or a heat pump.
Common requests- not cooling
- will not start
- airflow reduced
- water leaking
- unusual noise
Also calledac, a/c, air conditioning, air conditioning system, cooling system
Review boundary: Refrigerant and fixed electrical work require qualified service. Stop use for smoke, sparking, a burning smell, an overheated plug, or water near electrical connections.
Movable air-conditioning equipment using an exhaust hose and internal condensate management.
Common requests- not cooling
- water leaking
- exhaust warning
- fan or compressor noise
Also calledportable ac, floor air conditioner, rolling air conditioner, ac with exhaust hose
Review boundary: Stop use for an overheated plug, smoke, sparking, or water near electrical connections.
Self-contained cooling equipment installed through a window or wall opening.
Common requests- not cooling
- water draining indoors
- unit icing
- fan noise
Also calledwindow ac, window unit
Review boundary: Do not loosen an installed unit without safe support. Stop use for electrical heat, smoke, or sparking.
A ducted residential cooling system with indoor air-moving equipment and an outdoor condensing unit.
Common requests- not cooling
- outdoor unit not running
- airflow reduced
- system icing
- water leaking
Also calledcentral ac, central air, ducted air conditioner, whole home air conditioner, outdoor condenser
Review boundary: Refrigerant, high-voltage, condensate, and fixed HVAC work require qualified service. Stop use for smoke, sparking, a burning smell, or severe water leakage.
Ducted or ductless equipment that transfers heat for space heating and cooling.
Common requests- not heating or cooling
- outdoor unit icing
- water leaking
- error code
Also calledmini split, ductless heat pump
Review boundary: Refrigerant and fixed electrical work require qualified service. Stop use for burning smell, smoke, sparking, or severe icing damage.
Gas, electric, or oil-fired central equipment that heats and circulates air through ducts.
Common requests- no heat
- short cycling
- blower not running
- unusual combustion or mechanical noise
Also calledforced air furnace, home furnace
Review boundary: For gas smell or a carbon-monoxide alarm, leave the area and follow emergency or utility guidance. Licensed service may be required.
Central heating equipment that heats water for radiators, baseboards, fan coils, or radiant floors.
Common requests- no heat
- pressure loss
- water leaking
- radiators or zones stay cold
Also calledheating boiler, hydronic boiler, home boiler
Review boundary: Gas, combustion, pressure, and hydronic work may require licensed trades. Treat gas smell, a CO alarm, steam release, or major leakage as urgent.
Fixed natural-gas or propane hearth equipment that provides space heat through a fireplace, insert, or freestanding enclosure.
Common requests- pilot will not stay lit
- burner will not ignite
- fan or controls fail
- soot or unusual flame
Also calledgas fireplace, gas insert, propane fireplace, fireplace pilot, gas hearth
Review boundary: For gas smell, a carbon-monoxide alarm, soot, flame rollout, or smoke, leave the area and follow emergency or utility guidance. Licensed gas service is required.
Indoor ducted HVAC equipment that moves conditioned air and may contain a refrigerant coil, hydronic coil, electric heat, filter, and condensate system.
Common requests- blower not running
- weak airflow
- water leaking
- controls or electric heat fail
Also calledair handler, fan coil, indoor blower unit, ducted indoor unit
Review boundary: Fixed electrical, refrigerant-connected, hydronic, and condensate work requires qualified service. Stop use for smoke, sparking, burning smell, or water in energized controls.