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Poor capacity / high head
What is going on
Possible causes and checks for: poor capacity / high head.
Likely causes
- Dirty indoor or outdoor coil, dirty filters (one per indoor unit)
Check in this order
- Clean filters, bib-wash coils. p.856 [830]
More mini-split guides
- Indoor unit leaking water
- Water leaking
- Display shows a strange code or does not answer the remote - DLFSHB indoor
- Multi-zone: one room heats, another will not cool - DLC multi-zone
- Display shows a strange code or does not answer the remote - DLFSHB indoor
- Multi-zone: one room heats, another will not cool - DLC multi-zone
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Source: General HVAC service practice — verify per model. Written in our own words; check the manual for your exact model.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.