hot rads upstairs, cold down stairs!

[smudgewalking]

Hi, we have recently had our hot water tank moved into the attic , to make room for a shower. The boiler is only 18 months old, it is a baxi condensing boiler.
Since having the tank moved the radiators upstairs get hot but the rads down stairs are cold . we had the plummer back, he switched the rads off upstairs and re-balanced them. The following day they were back to being cold down stairs. He suggested using FERNOX, we have done that today, still no change. We have noticed a hissing sound coming from the boiler and the water is scolding hot.
Can any one help?

 

[bengasman]

If your boiler is only 18 months old and the installer says you need to use fernox, he did a pretty p1sspoor job on the installation.

 

[smudgewalking]

we think the same. He seems relunctant to come back out and look at it.My hot water is blue since putting the fernox in, and the rads are no hotter.

 

[Goldspoon]

Where did you put the Fernox?

What type of Fernox?

 

[daveaf]

Where did you put the Fernox?

What type of Fernox?

Sounds to me like it went in the wrong header tank and that you are bathing in Glycol. (anti Freeze)

FFS Dont drink any

 

[smudgewalking]

Was fernox F3 cleaner i put in.There is only one header tank. I have run all the hot water off, until it run clear.

 

[daveaf]

The plot thickens, this is why it is important to give as much info as possible regarding your system at the start of the thread.

I am now beginning to think you have a sealed CH system ie: no header tank. And you have actually put the fernox into your hot water feed tank I hope I am wrong though

Please give us more info. Is the header tank you added the fernox into, higher up than the hot water storage tank??

 

[smudgewalking]

Hi the boiler is a baxi potterton 24 HE.
The tank i put the fernox in ,is above the hot water tank. I have now run the water off and it is running clear.Advised to put Fernox in header tank. There is only one tank so that`s where i put it. Hot water came out of taps , very blue in colour.
Our problems started when the hot water tank was moved into the attic. The rads upstairs are hot , downstairs they are cold.

 

[WabbitPoo]

Please tell us u didnt allow anyone to drink the water (even boiled)....that stuff is very poisonous IIRC

 

[smudgewalking]

ha ha! Of course i never, i came home during my lunch and run all the water off and i have done it again since coming home.

 

[diy]

sounds to me you need to drain the system down then fill up again real slow.

(primatic cylinder?)

 

[smudgewalking]

Already done that. Drained the system 3 or 4 times and bled the rads. Also balanced the rads.

 

[diy]

you nedd to re-establish the bubble in the cylinder

 

[smudgewalking]

Thanks, but what`s the bubble in the cylinder? Thanks again for trying to help!

 

[daveaf]

Oh dear, you did what I had feared.

Oh well, give the hotwater a really good flush. Turn off the heating to the hot water tank to save gas and run it for several hours to flush it really well. As already mentioned, Glycol (blue) is HIGHLY poisenous even in low doses. However glycol poisoning is hard to detect So if you have ran a bath for the mother in law then you did the right thing.

You need to add the chemical via the filling loop on your boiler to get it into the system or via a radiator. Dont expect too much though. Most of these off the shelf chemicals are ****e and do nothing

Still at least you saved money on Radox bubble bath. people pay money to have blue water in the bath

If the guy that moved the tank suggested that you add fernox to the header tank, I dont think he remembers the job he did very well TBH.

What else did he move, Ie: pump, zone valves etc??