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Disturbances - Causes - Remedies

Any measures in order to remove disturbances in your heating system should either be judged or be eliminated by a specialist. Please apply to your installer or approach Heimeier directly.

Radiator does not heat or heats insufficiently only

Possible causes

  • The temperature setting of the thermostatic valve is below the actual room temperature
  • Air in the radiator
  • Heating system supplies either insufficient or no heating energy at all

Remedies/comments

  • External heat influences lead to an increased room temperature. Thus, the thermostatic valve throttles or even stops the hot water supply to the radiator
  • Vent the radiator
  • Arrange for checking of heating curve, circulation pump, time programme, hot water generator, etc.

The radiator remains heated up even with a closed thermostatic valve

Possible causes

  • In case of a continuous window ventilation (tilted window position) and low outside temperatures, the room temperature drops below the lowest temperature setting on the thermostatic valve
  • Valve seat is contaminated or soiled, i.e. the thermostatic head cannot shut off

Remedies/comments

  • Ventilation to be short but intensive
  • Have the foreign body removed.

The thermostatic head cannot be turned or only be moved in a limited manner

Remedies/comments

  • Either the blocking or limiting functions must be cancelled.

Possible causes

  • The thermostatic head was internally limited or blocked, e.g. a temperature setting was blocked or a setting range was limited towards a higher or lower level and, therefore, this adjustment cannot be changed from outside

Room temperature is distinctly below the set temperature

Remedies/comments

  • The thermostatic valve with incorporated sensor is covered with curtains, radiator covers or panelling etc.
  • The thermostatic valve with incorporated sensor is mounted in vertical position
  • The nominal performance of the radiator is insufficient in relation to the size of the room
  • The heating system does not supply sufficient energy

Possible causes

  • Take care that the thermostatic valve will be exposed to the circulating air of the room without any obstacle or have a remote sensor or remote dial installed
  • Arrange for installation of a remote sensor or remote dial
  • Have the heating curve or the radiator performance adapted
  • Arrange for checking of heating curve, circulation pump, time programme, heat generator, etc.

Room temperature is distinctly above the set temperature

Remedies/comments

  • The thermostatic valve does not capture the room temperature but is influenced by colder air, e.g. draught
  • External heat influences could cause an increase of the room temperature although the thermostatic valve did shut off the supply of hot water to the radiator

Possible causes

  • Take care that the thermostatic valve will be exposed to the circulating air of the room without any obstacle
  • Thermostatic valves utilize the external heat supplied free of charge for room heating and, thus save energy

Noise in the thermostatic valve

Remedies/comments

  • Excess differential pressure
  • Air in the heating system
  • Wrong flow direction passes through the radiator

Possible causes

  • Arrange for reduction of pump pressure or have the hot water distribution checked
  • Vent the heating system, refill water
  • Arrange for the flow direction to be corrected or have a corresponding valve installed