• Welcome to PlumbersForums.net - The international free plumbing advice forum. Professional plumbers sharing advice with fellow plumbers and DIY alike. Register for free today! - Checkout the Plumbing Advice forum and then our Plumbing Videos area which still needs populating.

Discuss Hot water tank firing but heating and water off in the Central Heating Forum area at PlumbersForums.net

P

Paul Moreton

We have a brand new house with a tank system and boiler. I had nest installed to control water and heating.
Sometimes when the water and heating times off the tank keeps on doing something.
I have to either reset the nest or turn the power off to the boiler for a bit to reset it.
Is this a nest issue or a valve issue?
 

Undertrained

Plumber
Gas Engineer
Messages
1,394
Solutions
2
Could be a fault on the nest giving out a switched live to the valve, or a sticking valve/switch.

Did it work correctly before the Nest was fitted?

You say brand new, how old is brand new? (I still call mine new, but it’s approaching 12 years old).
 

mikerotherby

Messages
3
This is a similar problem that I have, the system is about 2 years old Unvented, Nest with Baxi, and a Y system.

I have Smart meters, and can see the use of gas, while the heating is off and no call for hot water.

I have found the boiler firing up late evening 11 pm and cannot find why, it works fine to supply demand when required,

My current solution is to switch boiler off, (if I find it rouge firing) on the front of the boiler, this then allows pump to continue working to clear not required heat from the boiler, turn back on next morning and boiler fires up at normal @9am.

Has anyone met this with a Nest system?
 

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer
Messages
30,867
Solutions
2
Yes nest has an anti legionella cycle stays on for about an hour
 

Undertrained

Plumber
Gas Engineer
Messages
1,394
Solutions
2
Could be the 24v link if applicable has been left in.
 

mikerotherby

Messages
3
Thank for that, I will check out and post back my findings. Been away a few days so will be a week or so before I post any more, Thanks
 

Ziggie

Messages
79
This is the quote from manual

5.9 Emergency Mode (Fig. 20)
1. If communication is lost between the Transmitter and Receiver for longer than 1 hour the unit will go into continuous heating mode to ensure that the property will not be without heating.
2.This will continue until communication is re-established (see Section 7.2).
3.When in this mode the heating can be turned OFF & ON if required by operating the button on the Receiver:-
Heating ON = Receiver LED ON Heating OFF = Receiver LED OFF
 

mikerotherby

Messages
3
This is the quote from manual

5.9 Emergency Mode (Fig. 20)
1. If communication is lost between the Transmitter and Receiver for longer than 1 hour the unit will go into continuous heating mode to ensure that the property will not be without heating.
2.This will continue until communication is re-established (see Section 7.2).
3.When in this mode the heating can be turned OFF & ON if required by operating the button on the Receiver:-
Heating ON = Receiver LED ON Heating OFF = Receiver LED OFF
have you a link to manual, save hunting about, thanks
 

Reply to Hot water tank firing but heating and water off in the Central Heating Forum area at PlumbersForums.net

Similar threads

MrGatch
It was the motor on the two-port valve. Bought a new one from ScrewFix and clipped on just the actuator to the existing valve, wired it up and...
Replies
5
Views
564
MrGatch
MrGatch
C
If its a top mounted Dual Immersion then should look like the attachment(s) but maybe Dual Immersion in the above actually means two immersions...
Replies
8
Views
280
John.g
J
albert85
    • Like
I'm inclined to adopt the occam's razor principle. Your "engineer" does not know why it works but it does so don't touch it just in case it...
Replies
34
Views
1K
hometech
H
D
Will take a better look of it tomorrow but all I can tell at the moment is it’s from under the radiator area. Thanks for your help.
Replies
6
Views
105
Dracopro
D
M
Thanks, yes I will ask him when he comes in a couple of months. I've been asking him lots of questions lately so maybe I will give him a chance...
Replies
2
Views
217
miketurner201
M

Newest Threads (Please Reply)

Search Forum

Top