Cold radiators even though the thermostat is turned up? A stuck heating valve could be the reason. This is a common problem, especially at the start of the heating season. The radiator valve is important for heating control and influences energy efficiency.
Thermostatic valves control the flow of hot water in the radiator. After long periods of inactivity, such as in summer, they tend to jam. This is caused by wear and limescale deposits. Regular maintenance can help and extend their service life.
Electronic devices for heating control offer modern solutions. However, incorrect settings can cause problems. Hydraulic balancing can save up to 30%. If you have any other problems, you should consult a specialist.
Understanding the structure and function of a heating valve
To use a heating valve correctly, you need to know how it works. A thermostatic valve has various parts. These parts work together to precisely control the temperature in the room.
Components of the thermostatic valve
A thermostatic valve consists of important parts. These include the thermostatic head, the valve pin, the valve body and the union nut. Each part is important for temperature control:
- Thermostatic head: Contains a temperature-sensitive material
- Valve pin: Controls the water flow
- Valve body: Houses the valve pin
- Union nut: Connects the thermostatic head and valve body
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How the valve regulates the temperature
The thermostatic head reacts to temperature changes in the room. When the temperature rises, the material in the thermostatic head expands. As a result, the valve pin is pressed and less water flows through the radiator.
When the temperature falls, the material contracts. The valve pin rises and more hot water flows through the radiator.
Overview of different valve types
There are many types of thermostatic valves. They differ in function and price:
| Valve type | Functionality | Price from (€) |
|---|---|---|
| Manual thermostats | Simple adjustment by hand | 8 |
| Programmable thermostats | Automatic temperature control according to schedule | 15 |
| Smart thermostats | Control via app, adaptive | 25 |
| Wireless sensor thermostats | Wireless communication with central unit | 25 |
Programmable thermostats can save up to 10% on heating costs. There is a subsidy of 15% for the replacement. With hydraulic balancing, the subsidy increases to 20%.
Heating valve stuck – causes and solutions
A stuck heating valve can cause the heating system to overheat and increase costs. Valves are as thick as a nail, which makes them difficult to repair.
Common reasons for a stuck valve
Limescale and dirt are often the causes. Valves should be checked at the beginning of the heating season to detect problems at an early stage.
Step-by-step repair guide
There are six steps to repairing a valve:
- Remove the thermostatic head
- Locate the valve pin
- Carefully loosen with a hammer
- Clean and lubricate
- Check mobility
- Refit the thermostatic head
When replacement is necessary
Sometimes you need to replace the thermostat. This is necessary if:
- The valve is stuck despite cleaning
- Corrosion is visible
- The heating is running continuously
- Room temperatures reach over 26°C
A broken radiator can cost 432 euros more per month.
Preventive maintenance measures
Regular maintenance prevents problems:
- Move valves regularly
- Bleed the heating system in four steps
- Use softened water
- Carry out an annual professional inspection
These measures increase the service life and ensure efficient heating.
Conclusion
Functioning heating valves are important for efficient heating and comfort at home. Regular maintenance and the correct setting of thermostats help to save energy. A stuck valve can often be fixed quickly, sometimes even without experts.
Radiator valves last around 12 to 15 years. During this time, they can significantly increase the efficiency of the heating system. Electronic thermostats enable precise temperature control and save up to 30% heating energy.
To save energy in the long term, you should check your radiator valves every year. If problems occur, you should first try simple solutions such as loosening the valve pin. More complex repairs should be carried out by professionals to ensure the best heating performance.
