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AIR CONDITIONING & HEAT PUMP SYSTEMS
AGE of AIR CONDITIONERS & HEAT PUMPS
AIR CONDITIONER TYPES, ENERGY SOURCES
AIR FILTER EFFICIENCY
AIR FILTERS, FIBERGLASS PARTICLES
AIR FLOW MEASUREMENT CFM
BLOWER FAN OPERATION & TESTING
BOOKSTORE - Air Conditioning "How To" Books
CAPACITORS for HARD STARTING MOTORS
CIRCUIT BREAKER SIZE for A/C or HEAT PUMP
CLEANING & Legionella BACTERIA
COOLING LOAD REDUCTION by ROOF VENTS
CRITICAL DEFECTS on A/C SYSTEMS
DEFINITION of HEATING & COOLING TERMS
DEW POINT TABLE - CONDENSATION POINT GUIDE
DIAGNOSTIC GUIDES A/C / HEAT PUMP
DUCTS - Asbestos
DUCT INSULATION, Asbestos Paper
DUCT INSULATION for SOUNDPROOFING
DUCT SYSTEM & DUCT DEFECTS
DUCT SYSTEM NOISES
DUST, HVAC CONTAMINATION STUDY
ELECTRIC MOTOR OVERLOAD RESET SWITCH
EVAPORATOR COIL or COOLING COIL
EVAPORATIVE COOLING SYSTEMS
FAN NOISES, HVAC
GAUGE, REFRIGERATION PRESSURE TEST
HEAT LOSS (or GAIN) IN BUILDINGS
INSPECTION CHECKLIST - OUTDOOR UNIT
INSPECTION LIMITATIONS, A/C SYSTEMS
LOST COOLING CAPACITY
LOW VOLTAGE TRANSFORMER TEST
MOTOR OVERLOAD RESET SWITCH
MOLD in AIR HANDLERS & DUCT WORK
OPERATING COST, AIR CONDITIONER
OPERATING DEFECTS, AIR CONDITIONING
REPAIR & DIAGNOSTIC FAQs for A/C
RETROFIT SIZING for A/C or HEAT PUMPS
WATER COOLED AIR CONDITIONERS
This article lists significant heat pump system defects, definitions, and home inspection education topics.
This article series, beginning at BUILDING DEFECTS LISTS, provides lists of common building defects and basic defect knowledge that also outline recommended curriculum content for home inspector education.
The building defects and inspection points listed in these articles also guide homeowners and home buyers to building areas that merit careful attention and often point areas of safety concern or important maintenance and repair tasks. Page top heat pump sketch courtesy of Carson Dunlop Associates.
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5.2 Heat Pump Inspection Points, Defects, Knowledge Base Requirements
5.2.1 Knowledge Base Recommended for Heat Pump Inspections
1. Describe the function of a residential heat pump system.
2. Describe these types of heat pumps: air-to-air, air-to-water, air-to-ground. Include an operating cycle description.
3. Describe the principles of operation of heat pumps including terms such as Co-efficient of Performance (COP), balance point and auxiliary heat.
4. List the materials and components of a typical air-to-air heat pump including compressor, the outdoor coil, the indoor coil, the outdoor fan, the indoor fan, refrigerant lines, reversing valve, expansion devices, thermostat, auxiliary heat, indoor fan, outdoor fan, condensate tray and condensate lines, duct system, duct insulation, air filter.
5. Describe the features of adequate installation and repair technique for heat pumps.
6. Define the following terms as they relate to residential heat pumps:
7. Outline the typical life expectancy of residential heat pumps.
8. Identify the codes or standards which apply to residential heat pumps in your area.
5.2.2 Inspection skills for heat pump inspections
1. Describe the inspection procedure for heat pumps, including how to differentiate between heat pumps and air conditioning systems.
2. Identify the common defects listed on the next page.
3. Describe the implications of each defect.
4. Identify safety issues for the inspector and occupant of the home (same as air conditioning).
2. Communicate findings to client verbally and in writing, recommending corrective actions where needed.
List of Typical Heat Pump System Defects that can be Observed by Visual Inspection
Heat Pump Capacity
• Oversized for cooling
• Undersized for heating - review backup heat
Outdoor Condensing Coils
• Clothes dryer or water heater exhaust too close
• Iced up
• Poor location
Heat Pump Compressor / Condenser Unit Defects
• Electric wires too small
• Excess electric current draw
• Excess noise or vibration
• Inadequate cooling
• Inoperative in heating or cooling mode
• Missing electrical shutoff
• Out of level
• Running continuously
• Short cycling
• Wrong fuse or breaker size
Indoor Evaporator Coil Defects
• No access to coil
• Temperature split too low
• Temperature split too high
• Top of coil dry in cooling mode
. Watch out: these inspection lists do not list all possible defects for the systems discussed, and not all home or building inspectors will examine all of the items listed here. CONTACT us to suggest corrections or additions to articles at this website.
Also see HEAT PUMP SUBSYS DEFECTS LIST and see CONDENSATE HANDLING, A/C and DUCT SYSTEM & DUCT DEFECTS and see these heat pump article groups:
These curriculae and building defect lists are based on smilar curriculum documents first prepared by Joe Scaduto, an ASHI member who prepared course material for Northeastern University's Building Inspection Certificate program in 1988, subsequently by DF, InspectApedia's editor, for New York University ca 1988 and later, with others, recommended to ASHI, the American Society of Home Inspectors.
The curriculum and lists of defects are informed by additional analysis of the process of home inspection that was developed beginning Calgary, AB for Canadian and U.S. home inspector education and certification examinations in 1997. Other early contributors to home inspection education in the U.S. and Canada include Dr. Jess Aronstein, Alan Carson, Mike Casey, Mark Cramer, John Cox, Dwight Barnett, Douglas Hansen, Rick Heyl, Larry Hoytt, Bill Merrill, Kevin O'Malley, Dennis Robitalille, Keith Peddie, Pat Porzio, Roger Robinson. ASHI did not adopt this material though currently that association as well as others offer extensive HOME INSPECTOR EDUCATION material.
Continue reading at DEFECTS LIST - HEAT PUMP SUBSYS or select a topic from the More Reading links shown below.
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