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If your heater is failing to light or cycling without ignition
Tracks wear unevenly depending on pool surface texture and cleaner usage hours
Option 2 E-Z SOLUTION Automatic Daily Feed:
Upstream (before): ~12
MagnaSweep step heads are position- and flow-specific — confirm the Style designation (Style I
Pentair Fan Control Board | ETi® 400 Heater | 475978 S0175 If your heater is failingThe Pentair Fan Control Board (475978) is the OEM replacement control board for the ETi 400 Heater, managing fan operation to maintain safe and efficient heat exchange performance. IMPORTANT: LICENSED PROFESSIONAL INSTALLATION REQUIRED Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high voltage components without proper certification. The fan control
