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Cooling & Heat Pumps Heat pump controls

Defrost controls

Core

Understand demand and time-temperature defrost, test defrost boards, sensors and relays and set a system up to defrost properly.

Defrost initiation and termination, coil sensors, defrost relays and boards and the symptoms of a heat pump that defrosts too much or too little.

Before this skill

HVAC Excellence competency codes

  • HP-045
  • HP-047
  • HP-051
  • HP-048
  • HP-049
  • HP-050

Courses that teach this

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Career paths that include this skill