Heat pump won't cool

The heat pump runs but provides little or no cooling.

Heat Pump

normal

Possible cause

Reversing Valve
Component
The four way valve that lets a heat pump swap the roles of the indoor and outdoor coils.

Affected equipment

Heat Pump
Equipment
The same refrigeration cycle, reversed on demand, so one machine can heat and cool.

Local Code Notice

HVAC installation, venting, combustion air, ventilation air, gas piping, clearances, termination locations, electrical requirements, permits, and equipment requirements vary by jurisdiction and equipment. Always verify the applicable local codes, adopted code edition, regulations, permits, and manufacturer installation instructions before installation or service.