Checklists by equipment
2 lists · 11 items · 13 photosDuctless mini-split maintenance checklists
Ductless mini-split maintenance checklists for the quarterly and annual rounds: 2 free lists, 11 items and 13 photo requirements, each item naming what to look for and the photo that proves it. Work is commonly verified against IMC (mechanical code); the edition in force is the AHJ's call on each project.
The ductless mini-split rounds
Ductless mini-split QuarterlyDuctless mini-split quarterly maintenance checklistIndoor filters, condensate, line-set insulation and a heat-and-cool mode test on the quarterly round5 items6 photosDuctless mini-split AnnualDuctless mini-split annual maintenance checklistBlower-wheel and coil cleaning, drain flush and a charge check on the annual service6 items7 photos
Where each walk sits in the schedule
- Ductless mini-split quarterly maintenance checklistquarterly
- Every quarter, and ahead of each cooling and heating season since the same head runs both ways. Run by: The HVAC or maintenance tech on the quarterly round, working head unit by head unit through the occupied spaces.
- Ductless mini-split annual maintenance checklistannual
- Once a year, deep enough to reach the buildup on the blower wheel and coil that the quarterly filter change never touches. Run by: The HVAC service tech on the annual, with the heads opened up and gauges on the system where needed.
What most often fails on a ductless mini-split
- Indoor filters left loaded because each head is in a different room and one or two always get skipped on the walk.
- Condensate pump or drain backing up behind a wall-mounted head, showing up as a stain on the wall or ceiling below.
- Line-set insulation split or missing where it leaves the wall, so the exposed run sweats and drips down the elevation.
- Filters changed for years while the blower wheel behind them silently packs with biofilm and loses half the airflow.
- Drain flushed at the pan only, leaving the slime in the line that clogs again within weeks.
- Low charge chased with a top-off instead of a leak found, so the same head is short on capacity again next season.
Verified against
Families only, never clause numbers. Adoption varies by jurisdiction; confirm the edition your authority having jurisdiction enforces before you run a walk against it.
Common questions
- Which ductless mini-split maintenance rounds do these checklists cover?
- Ductless mini-split quarterly maintenance checklist (quarterly): Every quarter, and ahead of each cooling and heating season since the same head runs both ways. Ductless mini-split annual maintenance checklist (annual): Once a year, deep enough to reach the buildup on the blower wheel and coil that the quarterly filter change never touches.
- Who runs the ductless mini-split maintenance round?
- The HVAC or maintenance tech on the quarterly round, working head unit by head unit through the occupied spaces. The HVAC service tech on the annual, with the heads opened up and gauges on the system where needed.
- What most often fails on a ductless mini-split?
- Indoor filters left loaded because each head is in a different room and one or two always get skipped on the walk. Condensate pump or drain backing up behind a wall-mounted head, showing up as a stain on the wall or ceiling below. Line-set insulation split or missing where it leaves the wall, so the exposed run sweats and drips down the elevation. Filters changed for years while the blower wheel behind them silently packs with biofilm and loses half the airflow.
- Which standards is ductless mini-split work verified against?
- IMC (mechanical code), published by the International Code Council. Adoption varies by jurisdiction. Confirm the edition your authority having jurisdiction enforces before you run a walk against it.
- Can I run these checklists in RTI?
- Yes. Start a free RTI workspace and load any of the 2 lists (11 items in total). The Photo Gate holds the submit button until every mandatory item is answered and its photos are attached, and approved inspections roll into a branded turnover package with a tamper-evident audit trail.