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

Escutcheon

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

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

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

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

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