Hello forum members.
I am new to this forum.
I have a pressurised unvented system. Vaillant ecoTec plus 630 system boiler with telford tempest 300l tank. Turned on the heating a couple of weeks ago and found that the upstair radiators were not heating up. Went round bleeding the upstairs radiators without realising that the boiler pressure was at the lower end of operating limit. Bleeding the radiators resulted in the upstair radiators heating up. All well and good. Following morning no heating and hot water. Boiler displayed F22 fault code (0.7 bar). Topped-up the pressure to 1.2 bar and this resulted in boiler firing up, pump coming on. However the temperature of the boiler quickly rose to 84 degrees and then the pump went into overrun mode. CH Pipe further down the 2 port motorised valve was luke warm. Assuming this was something to do with motorised valve malfunction. Removed the valve head and can turn the valve spindle with hand without any resistance. Have the same situation with the 2 port HW motorised valve as well. At present, i have run out of things to try. I will post a photo of the setup with description shortly.
Many thanks in advance for guidance in resolving this.
Thanks
I am new to this forum.
I have a pressurised unvented system. Vaillant ecoTec plus 630 system boiler with telford tempest 300l tank. Turned on the heating a couple of weeks ago and found that the upstair radiators were not heating up. Went round bleeding the upstairs radiators without realising that the boiler pressure was at the lower end of operating limit. Bleeding the radiators resulted in the upstair radiators heating up. All well and good. Following morning no heating and hot water. Boiler displayed F22 fault code (0.7 bar). Topped-up the pressure to 1.2 bar and this resulted in boiler firing up, pump coming on. However the temperature of the boiler quickly rose to 84 degrees and then the pump went into overrun mode. CH Pipe further down the 2 port motorised valve was luke warm. Assuming this was something to do with motorised valve malfunction. Removed the valve head and can turn the valve spindle with hand without any resistance. Have the same situation with the 2 port HW motorised valve as well. At present, i have run out of things to try. I will post a photo of the setup with description shortly.
Many thanks in advance for guidance in resolving this.
Thanks