Inspection Training

How to Inspect AC Refrigerant Lines

While the inspector is on the exterior of the home the AC compressor cabinet should be evaluated. While inspecting the AC compressor cabinet the inspector should check the AC refrigerant lines to make sure that they are properly secured and have insulation that isn’t damaged. Please review the complete procedure below.



International Standards of Practice for Performing a General Home Inspection




I. The inspector shall inspect:






III. The inspector shall report as in need of correction:

B. If the cooling system was deemed inaccessible.


IV. The inspector is not required to:



Axium SOP Differences

Axium Requires: The inspector will check the AC Refrigerant Lines for any damage.


Tools Needed

No tools required to inspect the AC Refrigerant Lines.



  • While inspecting the air conditioner we want to inspect the AC Refrigerant Lines for any damage. The most common thing that we will see is damaged insulation. We want to check to make sure the lines are fully insulated, not crimped, not damaged, and properly secured. If everything looks good you will take one picture that shows the condition of the AC Refrigerant Lines.

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Common Defects

  • The AC Refrigerant lines having damaged insulation, visible frost, inadequate slack, or a seal wall gap.

screen-shot-2016-11-23-at-11-31-42-am      screen-shot-2016-11-23-at-11-35-22-am

Common Mistakes

  • Not checking the refrigerant lines thoroughly for any damage.
  • Not checking to make sure that the insulation is secure and covering up the lines.

Report / Software


  • The visible air-conditioner refrigerant lines appeared to be in serviceable condition.


  • N/A


  • There was not an air-conditioner refrigerant line installed at time of inspection.


  • The air-conditioner refrigerant suction line (large, insulated) [word 1]. A qualified contractor should evaluate and repair or replace as necessary.
    • Damaged Insulation
    • Frost Visible
    • Inadequate Slack
    • Seal Wall Gap