Old system playing up

[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