You’re welcome @lucia - thanks for watching. I’ve always found late spring and early autumn a challenge to maintain efficiencies and minimise heat pump stop/starts. Until last week, we’d cranked our weather comp curve right down. As of yesterday, heat pump for heating is now off.

@editor Until last week, we’d cranked our weather comp curve right down. As of yesterday, heat pump for heating is now off.

I can't turn mine off, I get cold in the evening and when it rains. I am just going to have to run it super low until /if the weather improves to a more consistent warmth. The wood burner is overkill at this time of year. Another good reason to get balcony/mini solar installed to at least keep the cost down. 

Posted by: @lucia

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Another good reason to get balcony/mini solar installed to at least keep the cost down. 

I forgot about this... what have you decided to do? 

@editor Oh nothing right now because $ needed for structural things but if I stay in my current house I thought I'd get a small, dual aspect 800 w kit (with micro inverter) put on the garage roof which is south facing.

A spark can cable it into the board which is also in the garage so very quick, simple installation. 

There's some really nice, dinky little, low cost set-ups all on the 'approved' list. I suspect the electrician will cost more than the solar kit.  🤷🏻‍♀️

Posted by: @lucia

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Now I'm a bit at sea with it and having to tweak settings again.

We just switch it to either heat or cool. Had it on cool for a couple of weeks, now temps have dropped on heat mode. Likely to cool again later in the week.

Ours is heat or cool, nothing in-between. Circulation pump runs 24/7/365, so always on.

Ours is still on - stat sits at 23 all year round and is either satisfied, or isn’t. In the winter months it’s rarely satisfied (weather comp set just right) and in spring/summer it eventually gets satisfied by solar gain/house warming up naturally.

Posted by: @hughf

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Ours is still on - stat sits at 23 all year round and is either satisfied, or isn’t

Ours is also still on.  Heat pump kicks in a bit at night when it's very cold (6C last night) and generally is off all day.  The key as mentioned above is to set the max temperature for heating parameter if there is one (I have a Vaillant so I have switched it to expanded mode which has a similar effect).

If there is no such setting then you could probably use the sensor built into the controller as a limiter, or if you have one and external thermostat, in either case the same as practiced by @hughf

Just looked at my WC setting, it is programmed for 25 Deg flow (my minimum allowed by ASHP) at 20 Deg outside. The return temp would have to drop to below 17 to get the HP to restart. If the house is at 20 that never going to happen.  Tonight we are expecting zero degs, so heat pump will run, but today it was 12 but sunny so heating stayed off.

So even though not programmed off, it just will not start when it's warmer anyway.