Old system playing up

[Dan hart]

I can't see where the wires go.

I think the wire from the Programmer goes to red on the flat 3 core. The same one that has a yellow connected to the White from the valve?

If that's correct then the wire should become live when you switch heating on

Yes that powers to 240v when I call for heating and powers down when ch is switched back off

 

[ShaunCorbs]

wiring dia for your stat on the inside of the cover ?

 

[Last Plumber]

With the Heating on and stat turned up, test the red and blue then test the blue and yellow

 

[Dan hart]

wiring dia for your stat on the inside of the cover ?

 

[Last Plumber]

Let me know what you get?

 

[Dan hart]

With the Heating on and stat turned up, test the red and blue then test the blue and yellow

Red + blue = 240v
Yellow + blue = 2v

Stat set at 30, heating on

 

[ShaunCorbs]

turn the power off

move the yellow wire to no 1 terminal (eg red and yellow together)

heating should start

 

[Last Plumber]

Stat broken.

Power off, put yellow onto red terminal, with red still on there, Power back. You will have linked out the stat till you get a new one.

 

[Last Plumber]

Shaun is steeling my Thunder !

 

[ShaunCorbs]

Shaun is steeling my Thunder !

no thor im not

 

[Dan hart]

turn the power off

move the yellow wire to no 1 terminal (eg red and yellow together)

heating should start

Yep, spot on! Gutted I bought a new valve now!

Is mine deemed a three wire thermostat even though I have 4 (earth)

 

[Dan hart]

Stat broken.

Power off, put yellow onto red terminal, with red still on there, Power back. You will have linked out the stat till you get a new one.

Thank you, a nice cheap part too!

Thanks for your help

 

[ShaunCorbs]

Yes Honeywell 6360b should sort you out

 

[Dan hart]

Shaun is steeling my Thunder !

No, no, I’m sure we play fair in here!

I really appreciate the help, thank you!

The netaheat lives still!

 

[Last Plumber]

Thank you, a nice cheap part too!

Thanks for your help

You're welcome. Get a 240V Room stat. There are different types on the market.

 

[Last Plumber]

That one Shaun mentioned is good. Get one of them!

 

[ShaunCorbs]

red in 1
yellow in 3
blue in 2
earth in eath

 

[Last Plumber]

red in 1
yellow in 3
blue in 2
earth in eath

Eath?
What's Eath Shaun lol

 

[Dan hart]

That one Shaun mentioned is good. Get one of them!

As I know that the rads used to heat a bit when the hot water was on (only hot water) I may still swap out the full valve and fully drain the system,, any inhibitors that you would recommend for my system & netaheat boilers?

Also, the water going into the expansion tank, if this continues after the thermostat change is there anything that this screams out as, as a fault?

 

[Dan hart]

red in 1
yellow in 3
blue in 2
earth in eath

Thanks Shaun

 

[Last Plumber]

As I know that the rads used to heat a bit when the hot water was on (only hot water) I may still swap out the full valve and fully drain the system,, any inhibitors that you would recommend for my system & netaheat boilers?

Also, the water going into the expansion tank, if this continues after the thermostat change is there anything that this screams out as, as a fault?

What's the Heat exchanger made from?
If it's anything other than Aluminium I'd use Fernox.

As far as the Tank goes, check the level first. When it's cold it should have 4 or 5 " of water in it.

 

[Last Plumber]

How old is this neataheat?
I remember one potterton did years back but there can;t be any of those left alive now!

 

[Dan hart]

What's the Heat exchanger made from?
If it's anything other than Aluminium I'd use Fernox.

As far as the Tank goes, check the level first. When it's cold it should have 4 or 5 " of water in it.

Blimey, I’m not sure what it’s made of - I will try and find a model number and look it up.

The expansion tank ball cock works, it doesn’t look like any of th hot water goes into the overflow, it’s like it is taking the water it’s displacing

 

[Last Plumber]

What speed is the pump on?

 

[Dan hart]

How old is this neataheat?
I remember one potterton did years back but there can;t be any of those left alive now!

It’s alive!!

When I had a gas pipe removed last year they sniffer tested it and it’s emmisions were better than most combi’s apparently