Bosch Temperature sensor 87160108090

Bosch temperature sensor 87160108090 is an NTC (negative temperature coefficient) sensor with a surface-mounted configuration. Its safety feature is preventing overheating in the heating system. It is used in a range of Bosch, Junkers, and Buderus boiler models, including ZWA24-2A/K, ZWC24-3MFA/MFK, ZWC28-3MFA/MFK, ZWC35-3MFA, ZWB28-3C, ZWE24-5MFA/MFK, ZWE28-5MFA/MFK, U042-24K, U044-24K, U052-24K, U052-28K, U054-24K, and GB072-24K. The article number for this item is 237.220.001.

Spare temperature sensors for heating systems are selected by resistance characteristic (commonly 10 kΩ or 12 kΩ at 25 °C), probe form (immersion, clamp-on, or sleeve), cable length, and connector type. When replacing such a sensor, ensure the resistance curve matches the original board's requirement; a mismatch will cause incorrect modulation or lockout. Before installation, verify the sensor's output against the expected resistance table at ambient temperature, and check that the probe is properly seated and secured to the pipe or well.

Common failure modes of this type include a drifting resistance characteristic, which makes the boiler modulate incorrectly, a broken cable that causes loss of the temperature signal, and poor thermal contact between a clamp-on probe and the pipe, leading to inaccurate readings. When a sensor fails, the equipment may lock out or operate erratically. Check the sensor's resistance against the expected table and inspect the cable and probe mounting for damage or poor contact.