This SPST aquastat features a liquid-filled 11-3/16" fast response bulb that sits directly in the water stream

The robust construction minimizes mechanical wear under high-cycle conditions

" excessive carbon monoxide production

For non-native applications

Always verify your specific model number against the technical data sheet

Utica-Dunkirk 240009669 Control Board 319825-402 This SPST aquastat features aThe Utica Dunkirk 240009669 Control Board is a critical genuine OEM replacement designed for ECR International boilers. This ATB control board, specifically the 2 4 element Revision C, manages the sequence of operation and safety timings to ensure your hydronic system maintains precise thermal regulation. When a furnace or boiler exhibits intermittent ignition failures or erratic limit cycles, installing this factory spec Utica boiler circuit board is