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Hello,
I have a Vokera Linea 24 boiler. At times the boiler starts up, makes some noises for about 10 seconds or so, then stops. I believe this is an overrun cycle. Recently the unit has developed an intermittent issue where by the unit starts up, makes some noises, but does not stop: the temperature drops from 40/50/60 degrees (depending upon the setting on the front panel), to around 10/12 degrees. There are no fault codes. Turning on a hot water tap or adjusting the central heating thermostat does not change this – I just get cold water. To stop this cycle and get hot water again I have to turn the HW/CW/OFF control to OFF (at which point the burner ignites – and then turn the control back to either HW or CH/HW.
I have had an engineer visit twice: a new pressure release valve and new thermistors for both the how water and central heating have been fitted. The instances of the issue have reduced, but still occur.
Can anyone suggest what the cause might be?
Many thanks,
Duncan
I have a Vokera Linea 24 boiler. At times the boiler starts up, makes some noises for about 10 seconds or so, then stops. I believe this is an overrun cycle. Recently the unit has developed an intermittent issue where by the unit starts up, makes some noises, but does not stop: the temperature drops from 40/50/60 degrees (depending upon the setting on the front panel), to around 10/12 degrees. There are no fault codes. Turning on a hot water tap or adjusting the central heating thermostat does not change this – I just get cold water. To stop this cycle and get hot water again I have to turn the HW/CW/OFF control to OFF (at which point the burner ignites – and then turn the control back to either HW or CH/HW.
I have had an engineer visit twice: a new pressure release valve and new thermistors for both the how water and central heating have been fitted. The instances of the issue have reduced, but still occur.
Can anyone suggest what the cause might be?
Many thanks,
Duncan