HVAC
What are the common causes of a compressor short cycling
Low refrigerant or dirty coils
Why is airflow important for HVAC system efficiency?
Maintains efficiency
What is the purpose of a defrost cycle in a heat pump?
Removes ice buildup
How does an expansion valve differ from a fixed orifice tube?
Expansion valve adjusts flow automatically
What causes an air conditioner to freeze up
Low airflow or low refrigerant
Explain the relationship between superheat and evaporator efficiency
Improves evaporator efficiency
What is the purpose of a condenser fan motor?
Removes heat outside
What is a manifold gauge set used for in HVAC work?
Measures refrigerant pressure
What are common causes of uneven heating or cooling in a home
Dirty filters or duct problems
What is preventive maintenance in HVAC?
Prevents breakdowns
what risks come from oversizing or undersizing equipment
Poor efficiency and comfort
What happens when an air filter becomes clogged?
Restricts airflow
Why is proper refrigerant line insulation important?
Prevents energy loss
what does a capacitor in hvac
Stores electrical energy
What is insulation important
Reduces heat loss
What is the difference between a heat pump and a traditional furnace?
Heat pump heats and cools; furnace only heats
What is the function of a capacitor start relay?
Helps motors start
What is the role of duct dampers in airflow control?
Controls airflow in ducts
What is the function of a condenser coil
Releases heat outside
What is a smart thermostat
Wi-Fi controlled thermostat
What does an evaporator coil do in an air conditioning system?
Absorbs indoor heat
How does humidity affect air conditioning performance?
Makes AC work harder
What is the role of duct dampers in airflow control?
Controls airflow in ducts
What is a ductless mini-split system?
Heating and cooling without ducts
How does a blower motor work
Moves air through the system