Hello
I have a Vaillant Comi Model VCW GB 242 EH for which I can no longer get the Hot water to increase to a reasonable temperature.
The DHW temperature adjuster produces mildly warm water when turned fully on.
The complete water section was replaced about 6 Months ago so I don't believe there's a fault there.
However when I reduce the Cold water flow into the system by turning off the valve under the boiler I can find a point where the temperature increases as the flow reduces.
Is this a scaled up Heat exchanger and is it worth descaling using chemicals ?
help please.. Tony
I have a Vaillant Comi Model VCW GB 242 EH for which I can no longer get the Hot water to increase to a reasonable temperature.
The DHW temperature adjuster produces mildly warm water when turned fully on.
The complete water section was replaced about 6 Months ago so I don't believe there's a fault there.
However when I reduce the Cold water flow into the system by turning off the valve under the boiler I can find a point where the temperature increases as the flow reduces.
Is this a scaled up Heat exchanger and is it worth descaling using chemicals ?
help please.. Tony