this outdoor temperature sensor is the likely culprit

Inspect the gasket during every annual boiler service

For VFD-driven motors

Integrated Access Valve: Includes a factory-installed pressure tap for accurate system diagnostics and service readings

If voltage is present but the 240V contacts fail to close

White-Rodgers G01A-332 Generator Els PW 17895 this outdoor temperature sensor isThe White Rodgers G01A 332 is a professional grade 750mV thermopile generator designed for high reliability performance in self generation control systems. For technicians in the field, this unit serves as a direct fit replacement for traditional screw in type generators and is fully compatible with E31 12 pilot burners. It features 36 inch armored cable leads to withstand high combustion chamber temperatures while protecting the internal wiring from