Buderus FSS solar circuit temperature sensor

Product detailed description

Buderus FSS solar circuit temperature sensor.

The sensor measures the temperature of a second consumer (e.g. a second cylinder or a pool) in the solar system and sends the value to the FM443 function module, which uses it to control the distribution of the collected solar heat between the individual consumers.

When you need this sensor

It is needed when a solar system with the FM443 module heats a second heat consumer in addition to the main cylinder.

Frequently Asked Questions

• How can I check that the „Buderus FSS solar circuit temperature sensor” fits my appliance exactly? The most reliable way is to compare the exact type/catalogue designation on your appliance's rating plate (boiler, cylinder, water heater) with the compatibility stated directly in this product's name (brand BUDERUS) and in its technical parameters above. If in doubt, send us the exact type designation of your appliance (including the serial number, if available) - we will be happy to verify compatibility for you.
• Why is it important to use an original/compatible part rather than a universal replacement? Parts such as seals, sensors, or safety components (safety valves, thermal fuses) are usually designed to match the exact parameters of the specific appliance (pressure, temperature, sensor electrical resistance) - an incorrect part can cause reduced function, leaks, or, in the case of safety components, even a genuine safety risk.
• Must this part be installed by a professional? For simpler, mechanical parts (e.g. seals, covers, small accessories not connected to electricity, gas, or the pressurised part of the system), a competent DIY person can usually manage the replacement after disconnecting the appliance from power and the supply lines. However, for any intervention in the gas, electrical, or pressurised part of the appliance (e.g. sensors located directly in the combustion chamber, safety valves, electrical modules), we always recommend a service technician - especially since such work could otherwise affect the validity of the warranty on the whole appliance.
• How do I know this part is worn and needs replacing? Common symptoms include visible wear or cracking (for seals and rubber parts), water or flue gas leaking at the location of the part, an error message on the control display (for sensors and electronic modules), or a clearly reduced function of the appliance (e.g. irregular burner combustion). If in doubt, the safest option is to have the condition assessed by a service technician during the regular annual inspection.
• Is it worth keeping this part at home as a spare/service part? For parts that are subject to regular wear (seals, fuses, small mechanical components) and whose failure would mean a shutdown of heating or hot water production, keeping a spare on hand is a sensible precaution - especially for an older appliance for which the part might be harder to source quickly.