Overtemperature Sensor

Protective component, cutting off power to the burner/heating system when a safe temperature is exceeded. Listed explicitly on the unit's wiring diagram as a key safety component.

Application

The sensor monitors temperature in the heating system and automatically cuts off power to the burner if the temperature exceeds a safe threshold – preventing water overheating, damage to heating components, or other hazards arising from an uncontrolled temperature rise.

Symptoms – when to replace

• The burner shuts off on its own despite correct water temperature, indicating a false trip of the protection.
• The protection doesn't trip despite visible system overheating – this is a serious symptom requiring immediate attention.
• The sensor is physically damaged or has a broken electrical connection on inspection.
• Incorrect or unstable temperature readings, despite a sound regulating thermostat.

How to choose the right part

Selection is based on reference number 44169 – this is a safety component, so only the original, matching catalog part should be used for replacement, with no makeshift substitutes or bypassing this protection.

When replacing the sensor, check that it is correctly connected according to the unit's wiring diagram – incorrect wiring can prevent the protection from working correctly even with a sound sensor.

[faq]

Can this sensor be temporarily bypassed (e.g. by shorting the circuit) so the unit keeps working until the part arrives?|No, this is a safety component protecting against overheating – bypassing it exposes the unit and the user to real risk. It's better to hold off using the heating function until the original part has been replaced.

[/faq]