- Joined
- 21 Nov 2023
- Messages
- 5
- Reaction score
- 0
- Country
Hello!
I have a Viessmann Vitodens 050-W 25kw boiler which was installed in the summer and have had the same trouble with it ever since. Aside from one of the radiators no longer working, which the plumber suggests is unrelated, the central heating is otherwise fine. But the upstairs hot water has not functioned correctly since installation.
The hot water runs fine downstairs - it reaches temperature quickly and maintains a steady temperature throughout the duration of running the hot tap.
Upstairs, all of our hot water fixtures - mixer taps, non-mixer taps and showers - have the same issue. When running the hot water it never reaches the correct temperature. It gets to around 10 degrees lower than the set temperature, then the boiler sounds like it powers down, the temperature drops a further 5-10 degrees, then the boiler powers up again as though it is cycling round. This happens around every 45 seconds. It does this constantly, no matter how long you run the shower or taps. I don’t think the gas ignition is turning off, it’s more of a slowing down sound than powering off completely.
In the summer it wasn't so bad, but now that the air is colder and, I guess because the water is colder in the pipes, it is very frustrating, especially in the shower as it's very uncomfortable.
The boiler is set to ECO mode for the hot water and the temperature is set at 50. Raising the temperature has no effect. Changing to COMFORT mode has no effect other than the water being warmer initially.
The water pressure upstairs has been noticeably lower since the new boiler installation but the pressure readouts on the boiler seem normal - between 1-2.
We can see the exact temperature of the water output going up and down in the Vicare app. I've made videos of this during the running of a shower/bath, as well as videos of the boiler itself to show the noise it makes while cycling up & down, and have sent them to both the plumber and Viessmann but they haven't provided any answers. The plumber is coming back at the end of the week.
We have 11 radiators, two showers and one bath.
Could this have anything to do with the flow rate of the boiler and if so, can this be adjusted? Is this something I could try to adjust myself?
Any ideas would be helpful, thank you!
I have a Viessmann Vitodens 050-W 25kw boiler which was installed in the summer and have had the same trouble with it ever since. Aside from one of the radiators no longer working, which the plumber suggests is unrelated, the central heating is otherwise fine. But the upstairs hot water has not functioned correctly since installation.
The hot water runs fine downstairs - it reaches temperature quickly and maintains a steady temperature throughout the duration of running the hot tap.
Upstairs, all of our hot water fixtures - mixer taps, non-mixer taps and showers - have the same issue. When running the hot water it never reaches the correct temperature. It gets to around 10 degrees lower than the set temperature, then the boiler sounds like it powers down, the temperature drops a further 5-10 degrees, then the boiler powers up again as though it is cycling round. This happens around every 45 seconds. It does this constantly, no matter how long you run the shower or taps. I don’t think the gas ignition is turning off, it’s more of a slowing down sound than powering off completely.
In the summer it wasn't so bad, but now that the air is colder and, I guess because the water is colder in the pipes, it is very frustrating, especially in the shower as it's very uncomfortable.
The boiler is set to ECO mode for the hot water and the temperature is set at 50. Raising the temperature has no effect. Changing to COMFORT mode has no effect other than the water being warmer initially.
The water pressure upstairs has been noticeably lower since the new boiler installation but the pressure readouts on the boiler seem normal - between 1-2.
We can see the exact temperature of the water output going up and down in the Vicare app. I've made videos of this during the running of a shower/bath, as well as videos of the boiler itself to show the noise it makes while cycling up & down, and have sent them to both the plumber and Viessmann but they haven't provided any answers. The plumber is coming back at the end of the week.
We have 11 radiators, two showers and one bath.
Could this have anything to do with the flow rate of the boiler and if so, can this be adjusted? Is this something I could try to adjust myself?
Any ideas would be helpful, thank you!