Pentair Thermal Fuse (White) | ETi Series Pool & Spa Heater | 475998 C4440

Pentair Thermal Fuse (White) | ETi Series Pool & Spa Heater | 475998 C4440The Pentair Thermal Fuse White (475998) is the OEM replacement thermal fuse for the Pentair ETi Series pool and spa heater line, including the ETi 250 and ETi 400 models. 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 thermal fuse is a one

The drive assembly is the core power electronics module of the IntelliFlo variable speed pump — it converts incoming AC power into variable-frequency output to control motor speed across the pump's operating range

or stripped base restores the structural integrity of the filter assembly and ensures proper alignment of all connected components

Escutcheon

If the existing pool plumbing cannot pull from the lower main drain

preventing unfiltered water bypass

the switch closes and signals the control board to allow ignition to proceed

Your Hayward SwimClear C2025 requires 4 cartridges for a complete service

stabilized enzyme formula with a phosphate remover blended in

This replacement assembly restores your Rainbow #126R leaf skimmer to full working condition

restoring the pump's internal water-tight integrity at the shaft interface

and SP1085 model families

the filter canister lacks the structural support needed to remain upright during operation