Assertion: heat pump | /r/HasProperty | notorious
Facets:
value: for clicking
type: PURPOSE
value: for knocking as the compressor
type: CAUSE
Source sentences:
text: Heat pumps are notorious for clicking and knocking as the compressor that circulates the refrigerant through the lines powers up or shuts down, producing sounds from the air handler (the part of the heat pump that installs inside the home and emits warm air).