pH HIGH
Pentair · Pentair IntelliChem Chemical Controller
The pool water pH is reading above the target setpoint (typically above 7.6-7.8). The IntelliChem will activate the acid feed pump to lower pH via muriatic acid or CO2 injection. If pH remains high despite acid dosing, check the acid supply container for adequate acid level, verify the acid feed pump is functioning (tubing not kinked, pump primed), and confirm the pH probe is reading accurately. High pH causes cloudy water, scaling, and reduces chlorine effectiveness.
Error pH HIGH on the Pentair Pentair IntelliChem Chemical Controller means: pH Above Target Range. The top-ranked community fix is “Replace Acid Feed Pump Tubing and Test Pump Operation” (medium difficulty, ~45 min, DIY cost: $10-$20). 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: $150-$250.
The Pentair Pentair IntelliChem Chemical Controller has 8 other known error codes:
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