valiant EcoTEC radiator temp

[Darren]

Thanks in advance. I have a valiant EcoTEC whilst the flow temp is set to 70 the heating flow only reaches a max of 45 when heating is demanded. (I can use chimney sweep mode to get to 70) but it means roads are never hot enough to warm house and boiler always on.

does this seem right?? Any ideas

 

[Stu-B]

Sounds like a blockage, You’ll need a registered gas safe engineer to take a look inside.

 

[Last Plumber]

It could be a number of things to be honest. It does sound like you need someone to look at it for you.
What controls do you have for it?

 

[doitmyself]

Thanks in advance. I have a valiant EcoTEC whilst the flow temp is set to 70 the heating flow only reaches a max of 45 when heating is demanded.

I had exactly the same problem. The engineer found that the heat exchanger was blocked so very little heat was passing over the waterways.

 

[Darren]

Thanks all, controls are just a Honeywell wall stat and timer. What confuses me is that it does heat up on the “chimney sweep” mode.
Looking on line suggestions that the D0 setting being in auto is not very good? Don’t want to mess with any setting but any opinions on that? The boiler is serviced regularly but not sure they are seeing the same “problem” as I am!

 

[Scott_D]

is the flow temp set by a knob/dial or buttons on your boiler?

 

[Darren]

is the flow temp set by a knob/dial or buttons on your boiler?

it’s set by buttons it does allow my to change as target is set at 75 as I recall.