Thanks for the pictures, they tell quite a story but nothing you can immediately do anything about.

The gague is a measuring device not something you can adjust.  The value it shows suggests that adjustments would likely be beneficial.

Unfortunately its not going to do any good at all changing things individually.

You need to

Turn all thermostats including any heatmiser ones to max

Turn the mixing valve to max

Operate the heat pump 24*7

The house will very likely overheat

Only once all of the above are done

Turn the heating curve down until the house is at the right temperature, making a change not more than every 24 hrs

If necessary balance the loops to get the relative room temperatures right.

What you are trying to do is to heat the house with the heat pump at the lowest possible flow temp, which occurs when the output from the ufh just equals the loss from the house and everything is operating continuously.  Fortuitously, for most houses, this is both the most comfortable and the lowest cost, perhaps the only example I know of thermodynamics working in our favour!

I would not recommend doing any of this until you understand it all, and I am happy to explain it if you tell me what you dont understand.

If you post a picture of the manifold I can probably tell you what various bits do and which ones you may need to change.

Also, how many water pumps can you see in total?

Once (with perhaps the occasional minor tweak).

But unless the company who visited came back every day for a week at least, they haven't finished it and have more likely set it up in a way to minimise the probability of call out rather than maximise comfort and minimise cost.  If your heatmiser thermostats are operational (is not set at least a couple of degrees above target) then they haven't really done it at all.

Everything I am suggesting is reversible so you cant really bugger it up.  

Unfortunately there is currently no substitute for the homeowner making these adjustments themselves because installers don't have the time and as yet there is no common automated way of doing it.  Many here including me have done it;  in the vast majority of cases it has improved things and in many it has solved long standing problems completely.

Let me know if you want to go ahead and if so which bis need more explanation.  

Thanks you. I’m not sure I know how to do some of the things you’ve suggested but will give it a try

Ok it's important they are done right and together.  What don't you know how to do, I'm sure we can provide a more detailed explanation.

Based on this discussion alone I presume this has not yet been done in which case, apart from trying to find the energy consumption in kWh, I would concentrate on making these adjustments which will take a couple of weeks to complete because you need to change the weather compensation slowly and allow things to settle for 24hrs between each change.  Once they are done we can reassess the position.

Please ask first about the things you don't understand in the changes I am suggesting.  There is no such thing as a silly question, we all have to start somewhere!

Your heatmiser thermostats are almost certainly a major part of the problem, both in terms of cost and comfort.  You could do worse than turning them all to maximum so that they are effectively disabled, and then adjusting the weather compensation curve down until the house is at the right temperature, if necessary adjusting the flow valves on the loops to balance the temperatures in different rooms.  Whilst you do this (and afterwards) the heat pump should be on 24*7.     If there is a mixer on the manifolds this also needs to be disabled by turning the target temperature to maximum.

If you haven't already done this you are missing the most important part of getting an ashp based system to work well at both maximum comfort and minimum cost, and it's very likely you would see a significant improvement by adjusting the way the system is operated.

We were paying £180 per month for gas and electric before all the work and we are now paying circa £260 a month if we average it out over a full year. It’s hard to know if this is normal given electricity prices have risen but it’s definitely more than we were led to believe so possibly our lack of understanding. The house is open plan so not sure if that is one of the issues. We have two manifolds as it’s a really long house!

As you say we need to make the best of this system I think as we wouldn’t get our money back for a long time if we switched back to gas as much as I feel like doing that!

it’s the eye watering electricity bills to be cold which is what stresses me out more than anything!

Understood.  You shouldn't be paying eye watering electricity bills to be cold.  You should be paying about the same as you would pay with gas and you should be warm other than when the temperature falls below about 4C for an extended period

To see if we can help can you provide any of the following information:

• Description of your house: Layout, construction, age, level of insulation (if you have floor plans then all the better) and floor area
• Any design information provided by your installer, or anyone subsequently however vague
• Type of emitters, radiators, UFH, fancoil? and how many were changed when the heat pump was fitted
• Some pictures of the heat pump, the hot water tank and any other tanks you know of as well as the area around them
• A summary of the problems you are experiencing, being as specific as possible
• How you currently operate it (timed, on thermostat/TRVs etc)
• How much energy you used annually for heating the house before the heat pump was fitted

If you dont have all of this tell us what you do have, it may be possible to make some suggestions.

Dont feel obliged to reply if you dont want to, its entirely at your option.