ASHP low pressure help pls

[Russdl]

3 hours ago, ProDave said:

usually indicate the expansion vessels(s) have failed.

How can that be possible in 5 years?
 

I guess only via dodgy installation/commisioning?

[Beelbeebub]

2 hours ago, Russdl said:

How can that be possible in 5 years?
 

I guess only via dodgy installation/commisioning?

5 years is a bit on the short side but I have had multiple ones fail, it's one of the most common things to fail in the heating systems I manage. Prob have one or two a year out of 35 or so. 

 

 

[Nickfromwales]

@canalsiderenovation

 

Don't run back into the arms of these dickheads out of desperation. They've not done a good job here, just perpetuated their revenue stream and kept themselves in business.

 

As part of their visit, they should have diagnosed, not just said "fit a bunch of new stuff". FFS. At the ABSOLUTE minimum, they should have asked to charge you for an hours labour, to check the red vessel pre-charge pressure, to ascertain what is going wrong. The system is too young to have major faults, this is a mountain being made out of a molehill IMHO.

 

The issue(s) is NOT diagnosed well enough yet, so we need to know if the discharged water was warm or hot, and if the heating blew this off or the UVC did. Without this info you, and the aforementioned dickheads, are just flying blind.

 

Leave the hot water on via the ashp and use your showers, you'll be fine for the immediate. Turn off the Solic, even though excess PV at this time of year is negligible anyways, which will reduce the magnitude of the situation.

[Dillsue]

A flip side to the companies approach maybe that the guy that attended for the service is an employee with a set schedule of services to complete in the day with householders taking time off work to wait in for him to arrive. If he gets drawn into doing unscheduled work there's a fair chance he'd mis subsequent appointments and the company would have an unhappy customer or two??

[SimonD]

7 minutes ago, Dillsue said:

A flip side to the companies approach maybe that the guy that attended for the service is an employee with a set schedule of services to complete in the day with householders taking time off work to wait in for him to arrive. If he gets drawn into doing unscheduled work there's a fair chance he'd mis subsequent appointments and the company would have an unhappy customer or two??

 

Okay, so I'm self-employed, but have a run of servicing appointments. As real example of a day, I turn up to my first one and find that the boiler was installed with its prv just sticking out the bottom of the boiler and terminating just behind some boxing in the bathroom. Not safe. So this needs to be dealt with. Next customer gets a text message - I'm sorry I'm running late but there's a safety issue. Arrive at the next customers house to find a shite install where the magnaclean has never been cleaned (even the bleed port is filled with plaster from when the kitchen was done years ago). Then, as I close the service isolation valves on the magnaclean, one of them springs a leak and it becomes apparent that when installed the maganclean connector threads had been damaged so as soon as I touch the thing to take the lid of another leak starts. So next customer gets a text. Then I go to a service where I did the installation and I've made up my time and can pick up my boy from school in time 😉

 

Life in the day of......that's what appointment windows are for ☺️ but every customer was happy to see me, some of whom I'd rescheduled from before Xmas. I find they're pleased to hear if I've found problems and rectify them as that gives them confidence I'll do them same for them.

 

Sorry long ramble.

[Nickfromwales]

4 hours ago, Dillsue said:

A flip side to the companies approach maybe that the guy that attended for the service is an employee with a set schedule of services to complete in the day with householders taking time off work to wait in for him to arrive. If he gets drawn into doing unscheduled work there's a fair chance he'd mis subsequent appointments and the company would have an unhappy customer or two??

And he should / could have used the opportunity to state all of that and book a return visit in. They didn’t. 
 

=💩

[Dillsue]

2 hours ago, Nickfromwales said:

And he should / could have used the opportunity to state all of that and book a return visit in. They didn’t. 
 

=💩

Didn't the company send in a quote for remedial work together with a service report??

[Nickfromwales]

1 minute ago, Dillsue said:

Didn't the company send in a quote for remedial work together with a service report??

They failed to do due diligence, just an assumed 2x dead EV’s at 5 years old. 
 

Sugar coat it if you wish. This is just shit service. 

[canalsiderenovation]

21 hours ago, Nickfromwales said:

Leave the hot water on via the ashp and use your showers, you'll be fine for the immediate. Turn off the Solic, even though excess PV at this time of year is negligible anyways, which will reduce the magnitude of the situation.

 

We can't leave the ASHP on for our hot water. I wouldn't feel confortable to be honest. Water was literally pi$$ing out of the tundish. Someone asked if it was hot or cold but I can't remember. I think cold..

 

28 minutes ago, Dillsue said:

Didn't the company send in a quote for remedial work together with a service report??

 

Yes and no. They did but in the hoo haa of the wrong email/billing issue it went to the wrong email address. I was then able to ask and get this resent which I posted on here.

 

On 11/01/2026 at 18:06, Beelbeebub said:

Which part of the system is that leaking tundish linked to? Is it the domestic hot water or the system loop? 

 

Is there a pressure gauge for the DHW tank?

 

 

Leaking tundish is on our Gledhill water tank. The only pressure gauge I can see is the one on earlier photos and pictures.

 

25 minutes ago, Nickfromwales said:

They failed to do due diligence, just an assumed 2x dead EV’s at 5 years old. 
 

Sugar coat it if you wish. This is just shit service. 

 

I spoke to the company today and have booked them in, hopefully Wednesday. I know @Nickfromwales you will be cursing me but frankly we are stuck. We have visitors later this week and an Airbnb booking so it is a case of sucking it up because the timing could not be worse. We used the gym showers tonight but we dare not turn on the hot water ASHP and have a lot of water coming out.

 

So this is what I am going to ask:

 

1. We want to keep those expansion tanks. Told they need replacing but saw no evidence of this. We want to check them/see this (if they remove them is there a way of checking they have failed if they remove them)? The service form says they need replacing so this indicates they have failed. Do companies routinely replace them or pump them back up??

 

2. We will explain what happened with the pressure dropping to 0, how I topped it up and the leaking tundish. Ask them to check valves are not faulty.

Edited 7 hours ago by canalsiderenovation