Does this unit switch one or two legs of power

the flame sensor is likely failing to send a sufficient microamp signal to the control board due to soot or oxidation

it allows for easy brazing without the need for expensive heat-sink materials

If the system cools down and the switch closes

the 23176CF functions as a critical link in the electric bridge circuit between the controller and Series 90 modulating motors

Schneider Electric (Erie) VM2427 Valve Body Els PW 17895 Does this unit switch oneThe Schneider Electric (Erie) VM2427 Valve Body is a rugged 1 inch NPT 2 way zone valve engineered for precision fluid control in closed hydronic heating and cooling systems. This forged brass valve body is a critical component for fan coil units, VAV reheat, and baseboard applications, featuring a linear flow characteristic with a robust 8. 0 Cv rating to manage high volume hot water or chilled water demand. Built to handle up to 300 psi static