Building systems
HVAC & Refrigeration Components replacement guide
Identify HVAC and refrigeration motors, compressors, contactors, capacitors, controls, thermostats, valves, coils, filters, igniters, fan parts, and service components by equipment model and operating requirements.
Evidence boundary. HVAC and refrigeration parts frequently depend on the equipment model and refrigerant circuit. Preserve the equipment identity and verify electrical, capacity, control, and certification requirements.
Items covered01 · 16 component types
- HVAC compressors
- Evaporators
- Condensers
- Expansion valves
- Thermostats
- HVAC contactors
- Pressure switches
- Blower motors
- Condenser fan motors
- HVAC belts
- HVAC pulleys
- Refrigeration controls
- Defrost controls
- Humidifiers
- Dampers
- Damper actuators
What to capture02
Equipment manufacturer, model, serial, revision, and refrigerantRecord this before searching for a substitute.
Component part number and equipment bill-of-material contextRecord this before searching for a substitute.
Voltage, phase, frequency, current, capacity, and control signalRecord this before searching for a substitute.
Connection, mounting, airflow or refrigerant circuit, and dimensionsRecord this before searching for a substitute.
Temperature, pressure, efficiency, safety control, and certificationRecord this before searching for a substitute.
What must match03
Equipment-model compatibilityConfirm it against the original equipment, duty, and source documentation.
Electrical and control compatibilityConfirm it against the original equipment, duty, and source documentation.
Capacity, airflow, refrigerant, or thermal dutyConfirm it against the original equipment, duty, and source documentation.
Mounting, connections, geometry, and rotationConfirm it against the original equipment, duty, and source documentation.
Safety controls, refrigerant rules, efficiency, and certificationConfirm it against the original equipment, duty, and source documentation.
Common searches04
What HVAC part replaces this number?
What compressor replaces this refrigeration model?
What motor fits this air handler or condenser?
Can I substitute this thermostat, contactor, or capacitor?
Authoritative starting points05