HVACopediaRheem · Heat pump
80 Low airflow
What the control is telling you
The ICC detects that the indoor unit cannot provide the minimum airflow the outdoor unit needs.
Applies to: (-)PRL-JEC 2-stage 16 SEER heat pumps: RPRL/UPRL-024JEC, -036JEC, -048JEC, -060JEC
Likely causes
- Indoor air mover misapplied or wrong size for the outdoor unit
Test and repair steps
- Confirm the air handler/furnace model is a matched, properly sized communicating unit.
- Check for dirty filter, closed registers or restricted ducts.
- Replace the indoor unit with a properly sized one if misapplied.
Settings for these units
- Outdoor unit clearances · Rheem/Ruud PRL-JEC heat pump (Comfort Control2 ICC)
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Source: Rheem (-)PRL-JEC Heat Pump Installation Instructions, 12.6 ICC Diagnostic Codes, p.30. Summarized in our own words; check the original manual for your model.
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