Central heating radiators going cold downstairs when hot water put on.. Help!!

saveallmymoney

What about a mis balanced system now with a faulty or too hot thermostat on the hot water tank which was previously shutting the valve after an hour or so and allowing all the flow through the all radiators but now is constantly leaving the valve open?

mikeluxy

Thanks for the info and LOL Keystone for the info about backfilling!!...I can just imagine a Laurel and Hardy type situation there!!...Perhaps I will give it a miss.

I have actually had a couple of Plumbers in and to be honest their solutions were "vague" to say the least...one suggested changing the pump (which I did myself) if that did not work change the Zone valve and if that did not work a full system flush....he forgot to add that all this costs lots of money...hence my idea to come on here and see if there were any more ideas.

The other guy has suggested replacing ALL the radiators up and down stairs citing the fact that they are very old and this "may" be the problem.

Before I try another plumber how about this idea....If there is a blockage in the pipe system somewhere....how about if I put some of that cleaning fluid in the system and leave it there for a month or so and then just drain and refil the system....?

I was inspired by what this guy wrote on a random forum which I found...Quote...

"our system has now been full of cleaning fluid for a couple of weeks (it slowly breaks down sludge deposits, and the manufacturers recommend that you leave it there for about a month).... and I can honestly say that the system is working much better than it ever has! - radiators which were once only lukewarm are now belting out the heat, and the boiler is working far more efficiently (noticable because the thermostat is set far lower than it used to be - I'm sure this is going to have a big impact on our bills!)"


The other BIG question is how easy is it to drain and refill a central heating system....is this within the limits of a DIYer such as myself...?

Any advice would be much appreciated...also any info as to the procedure for draining and refilling a system (open vented)

Cheers and thanks again chaps for your on going help

Mike

closed

changing the times on the timer is free

1984ReturnsForReal_2

So what is the score with this one then?


My money is on it being an installation issue & the OP is having a memory short-circuit.

keystone

keystone wrote: »

You really do need to get someone in to look at the system first hand and I would suggest the installer who installed your new boiler as a first stop. This has been going back and forth now for over 4 days and you are no closer to resolving the problem.

Make that over 5 days.

Make that 'phone call.

Cheers