COMM ERROR
Pentair · Pentair IntelliChem Chemical Controller
The IntelliChem has lost RS-485 communication with the pool automation system (IntelliCenter or EasyTouch). The IntelliChem will continue to operate independently based on its local settings. Check the communication cable and verify address settings.
Error COMM ERROR on the Pentair Pentair IntelliChem Chemical Controller means: Automation Communication Error. The top-ranked community fix is “Test and Replace RS-485 Communication Cable and Verify Device Address Settings” (medium difficulty, ~45 min, DIY cost: $10-$25). 2 community-ranked fixes available below.
Published February 2026 · 2 fixes · pool controller
Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.
While many pool controller repairs can be done safely at home, consider hiring a qualified technician if:
Average professional repair cost for this issue: $120-$180.
The Pentair Pentair IntelliChem Chemical Controller has 8 other known error codes:
Error code COMM ERROR also appears on 2 other Pentair models:
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