De Dietrich NTC temperature sensor S101003

The De Dietrich NTC temperature sensor S101003 is a surface-mounted thermistor designed for use in De Dietrich boilers. It monitors the heat carrier temperature and opens the circuit to shut off the gas valve if the temperature exceeds safe limits, preventing overheating. The sensor features a 2-wire connector and a heat-resistant plastic housing, making it easy to replace and install. It is compatible with a range of De Dietrich models including C 230 ECO, C 310 / 610 ECO, C 210 ECO, GT 300, DTG 230 ECONOX, MC 65 / MC 90, M 40-S, DTG 320 ECONOX, GT 430, DTG 120 NEZ DIEMATIC, GTE 500, G 300 S, DTG 350 NEZ/DIEMATIC, and DOMOGAS DGXE 14-47 (up to 04.95).

When selecting a replacement temperature sensor of this type, ensure the sensor type (NTC) and resistance characteristics match the boiler's control board. Verify the mounting form (surface-mounted) and connector type (2-wire) are compatible with the existing wiring. Compare the physical dimensions and housing material to ensure proper fit and heat resistance. Installation typically involves disconnecting the old sensor, connecting the new one via the 2-wire connector, and securing it in place.

Common failure modes for NTC temperature sensors include open or short circuits, leading to incorrect temperature readings or no signal. Symptoms may include the boiler failing to start, frequent cycling, or error codes related to temperature sensing. Check the sensor's resistance with a multimeter at ambient temperature and compare to expected values; also inspect wiring and connections for damage or corrosion.