Evohome firmware 02.00.19.31 Beta Trial - Exclusive for Automated Home Members

[Pbrain]

Thank you!

[sminkypinky155]

Anybody else having problems with the cold weather boost function?

This morning our lounge has a temperature of 16.5, with the outside temperature being 6 degrees. Setpoint normally 19, system has boosted to 20. But the heating is not on, radiators are stone cold.

System screen shows BDR at 14%, and the lounge at 30%. Anyone have an idea off what is going on?

I've now turned the boost off to see if that helps.

This isn't a new problem, I've noticed it a few times now, but this is the worst I've seen it.

[petep]

Anybody else having problems with the cold weather boost function?

This morning our lounge has a temperature of 16.5, with the outside temperature being 6 degrees. Setpoint normally 19, system has boosted to 20. But the heating is not on, radiators are stone cold.

System screen shows BDR at 14%, and the lounge at 30%. Anyone have an idea off what is going on?

I've now turned the boost off to see if that helps.

This isn't a new problem, I've noticed it a few times now, but this is the worst I've seen it.

I saw a similar problem last week.
Lounge was 1 degree below setpoint (boosted by 1 by cold wwather), no other zones wanted heat. Lounge wanted 100% BDR was 1% nothing happening.
I switched off load scaling (from full)

The lounge get's quite a bit of solar heating on sunny mornings and on those days continues to get heat from the adjacent conservatory.
I suspect load scaling has decided that it doesn't need much input from the boiler to warm it up - tough on a cold winter evening.

[bruce_miranda]

What is your Load Scaling set to?

[petep]

Turning off load scaling immediately resolved the problem.

[petep]

What is your Load Scaling set to?

Pay attention, Bruce.
"I switched off load scaling (from full)"

[sminkypinky155]

Was on 'normal' load scaling, adjusted to partial and immediately both went to 100%. Thanks for your help everyone.

[petep]

@atm any thoughts on this load scaling behaviour? It's clearly not desirable.

[bruce_miranda]

Load Scaling is a nice idea but I think the algorithm used in Normal is too suppressive. People seem happier with Partial.

[DBMandrake]

Yep, I had to give up on "Normal" / "Full" mode as it is too aggressive on my system causing rooms to struggle to meet their set points. Partial works well for me.