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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Plumbing Questions >> Replaced adiator... now no hot water? https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1133294040 Message started by Dave.B on Nov 29^th, 2005, 7:54pm

Title: Replaced adiator... now no hot water?
Post by Dave.B on Nov 29^th, 2005, 7:54pm

Oops...
I replaced the bathroom radiator at the weekend - drained the system, replaced the rad, refilled and everything was hunky dory: CH working perfectly.
However, there is no hot water now. What am I likely to have done?

The system is an old fashioned boiler, not a combi, and that is working as it should, but there is no water from the taps, unless I put the immersion heater on (obviously).

Any ideas?

Title: Re: Replaced adiator... now no hot water?
Post by thescruff on Nov 29^th, 2005, 8:04pm

No water in the taps or no hot water in the cylinder :-/

Primary pipes are air locked look for an air vent around the cylinder

Title: Re: Replaced adiator... now no hot water?
Post by Dave.B on Nov 29^th, 2005, 8:23pm

Cheers scruff.
There is water coming from the taps, but it's cold, and the tank itself is cold too.

I found the air vent next to the cylinder and released loads of air from it while refilling the CH system.
There has since been loads more air released (it's not my house, it's my my in-laws')

So is it just a question of letting everything circulate, and releasing air until it works? Or is there a way to force the air out (like you guys helped me do with my radiator last year).

As always, I greatly appreciate your advice.

Title: Re: Replaced adiator... now no hot water?
Post by thescruff on Nov 29^th, 2005, 8:29pm

Turn the pump and boiler off and vent it, you should get most of it first time

Title: Re: Replaced adiator... now no hot water?
Post by CWatters on Nov 29^th, 2005, 9:13pm

If the rads get hot but the H/W tank doesn't then... Perhaps when the system was drained you got some crud in the valve? It could be stuck pointing in the heating direction?

Title: Re: Replaced adiator... now no hot water?
Post by Dave.B on Nov 29^th, 2005, 10:26pm

Guys,
Thanks a million for the replies. It's fixed now. My brother in law let a load more air out of the valve before they came round earlier. Hot water was working when they got back just now.
Thanks to both for the advice, I just read on screwfix about a scary way to bleed the air out of the primary circuit in the tank. Glad it didn't come to that.

BTW - I'm fitting my new bathroom next month, so you might hear some more from me then!
Cheers
Dave