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Heat pump schematic (C) Carson Dunlop AssociatesHeat Pump Component Defects List & Home Inspection Education

Heat pump subsystem defects list:

Education curriculum & inspection checklists for heat pump systems. This article follows DEFECTS LIST - HEAT PUMP and lists significant heat pump component and ancillary subsystem 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 schematic courtesy of Carson Dunlop Associates, a Toronto home inspection, education & report writing tool company [ carsondunlop.com ].

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Home Inspection Education Curriculum - Heat Pump: Defects in Backup heat, Condensate Handling, Duct Systems, Expansion Devices, Fans-outdoor, Refrigerant lines, Thermostats

A/C Condensate Drain Pan  Defects                    

• Dirt in pan                      

• Inappropriate pan slope      

• No float switch

• No auxiliary pan              

• Pan not well secured

• Pan cracked                    

• Pan leaking or overflowing       

• Rust or holes in pan 

Shared drain

Missing drain

Clogged drain

Leaks  

Condensate Drain Piping Line Defects

• Blocked or crimped

• Disconnected or missing

• Improper discharge point

• Leaking, damaged, split

• No trap

Condensate Disposal Pump Defects

• Inoperative

• Leaking

• Poor wiring

• improper discharge location

• crimped, bent blocked discharge tube

Duct Vapor Barriers

• Damaged

• Missing

• No float switch

• No auxiliary pan 

• Pan not well secured

• Pan cracked                            

• Pan leaking or overflowing             

• Rust or holes in pan                   

Thermal Expansion Devices: Cap Tube & TEV Defects on Heat Pump Systems                                                       

• Capillary tube crimped,

disconnected, leaking

• Thermostatic expansion valve

loose, clogged, sticking                     

Outdoor Condenser/Fan Unit Defects on Heat Pump Systems    

• Corrosion                              

• Dirty

• Excess noise or vibration     

• Inoperative                       

• Mechanical damage                

• Obstructed airflow                

Refrigerant Line Defects on Heat Pump Systems

• Damaged

• Leaking

• Lines too warm or too cold

• Lines touching each other

• Low points or improper slope in lines

• Missing insulation

Indoor AHU Fan Unit Condensing Coil Defects on Heat Pump Systems      

• Corrosion                              

• Damage

• Dirty       

• Dirty or missing filter     

• Excess noise or vibration       

• Inoperative              

• Misadjustment of belt or pulleys 

• Undersized       

Room Thermostat Defects on Heat Pump Systems                     

• Damaged

• Dirty

• Inoperative

• Loose

• Not level

• Poor adjustment or calibration

• Poor location

Duct System Defects on Heat Pump Systems

• Dirty

• Disconnected or leaking                

• Humidifier damper missing

• Incomplete

• Obstructed or collapsed  

• Poor support

• Poor balancing                        

• Supply or return registers

– Too few                         

– Poor location                   

– Obstructed

• Undersized for cooling

• Weak airflow    

Duct Insulation Defects on Heat Pump Systems

• Incomplete

• Missing

• Incomplete

• Missing                             

Backup Heat System Defects on Heat Pump Systems

• Missing

• Inoperative

• Poor location

• Runs continuously

Readers should see AIR CONDITIONING & HEAT PUMP SYSTEMS for our complete list of articles on this topic.

Use the Search Box at the top or bottom of these pages to find in-depth information about building, energy savings, and indoor environment inspection, diagnosis and repair at this website. 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.


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Continue reading at DEFECTS LIST - AIR CONDITIONING or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

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DEFECTS LIST - HEAT PUMP SUBSYS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.


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