10
Disturbances - Causes - Remedies
Radiator does not heat or heats insufficiently only
Possible causes
Remedies/comments
– The temperature setting of the
– External heat influences lead to an
thermostatic valve is below the
increased room temperature. Thus, the
actual room temperature
thermostatic valve throttles or even stops
the hot water supply to the radiator
– Air in the radiator
– Vent the radiator
– Heating system supplies either
– Arrange for checking of heating curve,
insufficient or no heating energy
circulation pump, time programme,
at all
hot water generator, etc.
The radiator remains heated up even with a closed thermostatic valve
Possible causes
Remedies/comments
– In case of a continuous window ven-
– Ventilation to be short but intensive
tilation (tilted window position) and low
outside temperatures, the room tem-
perature drops below the lowest tempe-
rature setting on the thermostatic valve
– Valve seat is contaminated or soiled,
– Have the foreign body removed.
i.e. the thermostatic head cannot shut off
The thermostatic head cannot be turned or only be moved in a limited manner
Possible causes
Remedies/comments
–
The thermostatic head was internally
– Either the blocking or limiting func-
limited or blocked, e.g. a temperature
tions must be cancelled.
setting was blocked or a setting range
was limited towards a higher or lower
level and, therefore, this adjustment
cannot be changed from outside
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 (see reverse page of this brochure).
