Pentair Pentair IntelliChem Chemical Controller ACID FEED Error Fix: Acid Feed Pump Fault

Error code ACID FEED on the Pentair Pentair IntelliChem Chemical Controller means: Acid Feed Pump Fault. The muriatic acid feed pump is not dispensing acid as commanded. The pump may have lost prime, the tubing may be kinked or clogged, or the pump motor has failed. Check the acid supply container — the tubing should be submerged in acid. Inspect the tubing for kinks, clogs, or chemical crystallization. Verify the pump is receiving power from the IntelliChem controller.

The most successful fix is "Test and Replace Acid Feed Pump Motor" (medium difficulty, ~45 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

This error is rated warning severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Test and Replace Acid Feed Pump Motor") is rated medium difficulty and takes about 45 minutes. Tools needed: Multimeter, Phillips screwdriver, Needle-nose pliers.

DIY cost: $10-$20. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

The Pentair Pentair IntelliChem Chemical Controller has 8 other known error codes, including: CHLOR FEED (Chlorine Feed Fault), COMM ERROR (Automation Communication Error), FLOW ERROR (No Water Flow Through Sensor Chamber), ORP HIGH (ORP Above Target), ORP LOW (ORP Below Target), and 3 more.