I hope someone can help please.
We have a Viessman Vitodens 100W conventional boiler, just over 3 years old. It is controlled by a Salus RT310i thermostat that also works with an app.
This past few days, the red and green lights on the Receiver are on (solid) when on Auto, but the heating is not coming on.
The boiler works and heats the hot water.
If we switch the Receiver to Manual, the heating still doesn't come on (red and green lights on).
Oddly, if we switch the hot water on while the Receiver is set to Manual, it heats the radiators.
I have followed previous threads where it was suggested to reset the thermostat and Receiver, but that hasn't solved it.
Also if I manually changed the Sunvic SZ2301, the radiators heat up. I thought that may be the issue (when it broke previously years ago, before the boiler replacement, I replaced it), so I changed it for a Danfoss HPA2, but it hasn't solved the issue.
Has anyone got any other suggestions please?
My final port of call will be getting a heating engineer out after Christmas, but I was trying to solve it myself first.
Many thanks
We have a Viessman Vitodens 100W conventional boiler, just over 3 years old. It is controlled by a Salus RT310i thermostat that also works with an app.
This past few days, the red and green lights on the Receiver are on (solid) when on Auto, but the heating is not coming on.
The boiler works and heats the hot water.
If we switch the Receiver to Manual, the heating still doesn't come on (red and green lights on).
Oddly, if we switch the hot water on while the Receiver is set to Manual, it heats the radiators.
I have followed previous threads where it was suggested to reset the thermostat and Receiver, but that hasn't solved it.
Also if I manually changed the Sunvic SZ2301, the radiators heat up. I thought that may be the issue (when it broke previously years ago, before the boiler replacement, I replaced it), so I changed it for a Danfoss HPA2, but it hasn't solved the issue.
Has anyone got any other suggestions please?
My final port of call will be getting a heating engineer out after Christmas, but I was trying to solve it myself first.
Many thanks