Siemens Industrial Controls 3RU2126-1KB0 Relay 326070-701 failure to generate a spark

failure to generate a spark at the pilot assembly

and system sensors

which is critical for heat pump balance point control and auxiliary heat lockout functions

measure resistance across the two yellow leads

Johnson Controls T-3102-1 Heating - Cooling Deadband Thermostat

Siemens Industrial Controls 3RU2126-1KB0 Relay 326070-701 failure to generate a sparkThe Siemens 3RU2126 1KB0 Overload Relay is a mission critical component within the SIRIUS 3RU2 thermal relay series, specifically engineered for the current dependent protection of motors with normal starting currents. This thermal motor protection relay covers a setting range of 9 to 12. 5A, making it a standard choice for Size S0 contactors. Unlike general purpose protection, this bimetallic relay addresses overload and phase failure (phase loss)