hot water won't turn off | Central Heating Forum | Page 3 | Plumbers Forums

  • Welcome to PlumbersTalk.net

    Welcome to Plumbers' Talk | The new domain for UKPF / Plumbers Forums. Login with your existing details they should all work fine. Please checkout the PT Updates Forum

Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws

American Visitor?

Hey friend, we're detecting that you're an American visitor and want to thank you for coming to PlumbersTalk.net - Here is a link to the American Plumbing Forum. Though if you post in any other forum from your computer / phone it'll be marked with a little american flag so that other users can help from your neck of the woods. We hope this helps. And thanks once again.

hot water won't turn off

Post thread
Post reply

Discuss hot water won't turn off in the Central Heating Forum area at Plumbers Forums

Not a problem
 
Bradley31 said:
I disconnected the orange wire and turned the power on. The MV still moved around and engaged the switch but the boiler didn’t fire up (I guess that’s what the orange wire does :))
Click to expand...

Good to see problem solved by removing the permanently live grey wire from terminal 8, think I have seen something like this on a outside grant boiler where the frost stat was incorporated in here, it may be worth tracing this wire sometime especially before winter sets in especially if you have a outside boiler, also would be interesting to see where the ufh is controlled from sometime.
 
John.g said:
Good to see problem solved by removing the permanently live grey wire from terminal 8, think I have seen something like this on a outside grant boiler where the frost stat was incorporated in here, it may be worth tracing this wire sometime especially before winter sets in especially if you have a outside boiler, also would be interesting to see where the ufh is controlled from sometime.
Click to expand...
The UFH set up is in the pictures. The MV is on the pipe straight out of the boiler to the right. The controls are just above the boiler to the right. The UFH controls were just added to the CH controls that were already there. I am pretty sure something is wrong with this setup, nothing has been as it should since it was installed.
I have highlighted where the wire from upstairs that I disconnected goes on the frost stat
I have no idea what will happen come winter with the wire that I disconnected - or even it will have any affect on anything?
 

Attachments

  • 3FE3B5BB-54C0-43FF-A956-022946AF7F72.jpeg
    3FE3B5BB-54C0-43FF-A956-022946AF7F72.jpeg
    601.2 KB · Views: 28
  • 94C6266F-9B5D-45B2-8AD5-FA13074F8D1C.jpeg
    94C6266F-9B5D-45B2-8AD5-FA13074F8D1C.jpeg
    624.5 KB · Views: 27
  • D311E34A-6842-412C-8AF4-E998103159E5.jpeg
    D311E34A-6842-412C-8AF4-E998103159E5.jpeg
    394.9 KB · Views: 28
  • F0676ED8-C397-46FA-A23A-E3172E58ADC3.jpeg
    F0676ED8-C397-46FA-A23A-E3172E58ADC3.jpeg
    678.8 KB · Views: 28
  • 76E2DBAD-C457-4CB3-9DCF-A92C5E8710B5.jpeg
    76E2DBAD-C457-4CB3-9DCF-A92C5E8710B5.jpeg
    533.3 KB · Views: 27
  • 4104F54A-678C-4377-9582-50D398CC4008.jpeg
    4104F54A-678C-4377-9582-50D398CC4008.jpeg
    522.3 KB · Views: 28
There also seems to be a brown wire in terminal 3 of the frost stat as well as the grey wire which presumably should be a switched live, wonder if that brown is the permanent live and should be somewhere else?.
 
Yep looks like a frost stat issue looks like 3 wires into terminal 3 when there should be one

They’ve buggered the wiring up when they’ve added the extra 2 port /ufh
 
Last edited:
John.g said:
There also seems to be a brown wire in terminal 3 of the frost stat as well as the grey wire which presumably should be a switched live, wonder if that brown is the permanent live and should be somewhere else?.
Click to expand...
The grey cable in terminal 3 is to the MV of the UFH. It also has a black cable from the cable coming from upstairs and the brown wire from the MV control box. The permanent live from upstairs that is disconnected is in the blank terminal to the right of terminal 4.
 
Could you run a new wire from the ufh manifold to upstairs where the wiring centre is ?
 
Bradley31 said:
The grey cable in terminal 3 is to the MV of the UFH. It also has a black cable from the cable coming from upstairs and the brown wire from the MV control box. The permanent live from upstairs that is disconnected is in the blank terminal to the right of terminal 4.
Click to expand...
What is the stat's make/model?
 
Bradley31 said:
It’s a long way through a few rooms and ceilings
Click to expand...

That’s why I think they’ve done it the wrong way would need a new 6 core running back
 
New posts

Similar plumbing topics

M
Heating issue but hot water works
The power to switch the boiler on for heating...
Replies
2
Views
846
Basher
B
N
Water Heating Wont Work Unless Tank Thermostat Is Turned up and Down Manually!
I had a quick look for a possible alternative...
Replies
8
Views
770
Basher
B
T
Y plan provides hot water when turned off
John Thank you for all your help, changed the...
Replies
13
Views
2K
Tom5099
T
M
Bubbling hot water going to header tank
Thank you
Replies
2
Views
773
Merlin1
M
J
Diverter Valve / No Heating Help
Heating will run until hot gets up to...
Replies
1
Views
897
exedon2
exedon2
Back
Top