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What is the primary purpose of the thermocouple in a heating system?
✔✔ To measure temperature.
What is a common cause of a short cycle in a heating system?
✔✔ A faulty thermostat or improper calibration.
What tool is essential for checking the refrigerant pressure in an HVAC system?
✔✔ Manifold gauge set.
When troubleshooting an HVAC system, what is the first step to take?
✔✔ Verify that the system is receiving power.
How does a capacitor affect an HVAC motor?
✔✔ It helps start and maintain the motor's operation.
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,What is the main function of an expansion valve in a refrigeration system?
✔✔ Regulate the flow of refrigerant into the evaporator coil.
What can cause uneven cooling in a central air conditioning system?
✔✔ Dirty air filters or blocked ducts.
What should be checked if a furnace is not igniting?
✔✔ Check the igniter or flame sensor.
What is the correct order of operation for an HVAC system starting up?
✔✔ Thermostat signals for cooling or heating, blower motor starts, compressor kicks in.
What is the purpose of the blower motor in an HVAC system?
✔✔ To circulate air through the ductwork.
What does a high-pressure switch do in a refrigeration system?
✔✔ Protects the compressor from damage due to excessive pressure.
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, What is the main purpose of an air handler in an HVAC system?
✔✔ To circulate conditioned air throughout the home or building.
What could cause a compressor to overheat in an HVAC system?
✔✔ Low refrigerant levels or dirty condenser coils.
What should be done if an air conditioner is blowing warm air?
✔✔ Check for refrigerant leaks and ensure the compressor is functioning.
In HVAC systems, what does a defrost cycle do?
✔✔ Removes ice buildup from the evaporator coil in heat pump systems.
What is the purpose of the evaporator coil in a cooling system?
✔✔ To absorb heat from the air inside the building.
How do you check for a refrigerant leak in an HVAC system?
✔✔ Use a leak detection kit or UV dye.
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