Three of the radiators in my house are stone cold the others are roasting,i've tried to bleed them but no air comes out only water.
If i bleed off about a pint of water the radiator starts to heat up at the bottom but once i stop bleeding the water it goes cold again,any tips please ??

 

Get Euan on the case mate. He'l sort ya out

 

Mr Begbie are you there.

 

are you bleeding the highest radiator? apart form that im unsure...

 

All on one level m8

 

turn the radiators off which are heating up that should push the heat to the cold rads, also sounds like the system needs balancing

 

Whats balancing m8 ?

 

balancing means to balance the flow to each radiator.

what you need to do is take the cover off the loack shield valve (the oposite valve to the one you can turn) and screw in the valve on each of the radiators which heat up quickly.

 

Cheers for that m8.

 

has this just happend Kev?

 

More or less over the last week euan

 

What kind of boiler is it mate...

 

Combi , how do i get the plastic head off the thermostat valve at the rad ??

 

Dont rush in mate....

Read me the exact model and make from the fron of the boiler

 

Ideal mini c28 m8.

 

Whats the presure at?

 

1.5 bar

 

everything seems cool then.

turn all the rads off athen turn on each of the problem ones and make sure they heat up

 

Doing that now m8,is it a blockage somewhere ? Weird that when i drained off water the bottom of the rad heated up .

 

seems as their is a restriction somewhere mate...

what colour is the water coming out the rads?

 

The one in the bog was black the others were clear.

 

Have the non heating up rads have thermostatic rad valves (trv) fitted?, if yes then try to unscrew the trv head only, and push the little pin which is now exposed on the trv body in and out GENTLY, wait a couple of seconds and the pipe leading to the rads may start to heat up. The trv may be stuck and might need some gentle encouragement with a hammer to the the body of the trv to free it!

If not, the system may need balancing?

 

black water usually means blockages or the start of problems.


this can be cured by adding chemicals to the system but its not really a job for a DIY'er no disrespect mate.

Best thing to do in short term is let the boiler pump to each of the prob rads only(all others closed) for ten mins to try and clear any partial blockages then open all the rads and report back

 

How does the plastic head come off ?

 

Will do euan thats a beer im owe ya m8.

 

Unlikely that 3 TRVS have jammed at the exact same time...

We need to know what kind of rad valves before I can say how to take them off.

Take a pic?

Systems dont tend to just need balenced after years of working perfectly unless there is somekind of restriction forming..

 

If the water is that black and sludgie out of the system, just adding a chemical into the system is a waste of time and effort, you'd be better off getting someone in to power flush the boiler and system!

 

Valves are westherm if that helps at all.

 

tell him the price and wait for him to faint

 

Just below the plastic trv head is normaly a chrome lock nut type thing, use some adjustable grips to undo.

 

I heard its hundreds .

 

Scot gas charge 600 ish mate

Dont worry too much just now tho...

Any of your mates plumbers asit easier to get them in to try the basics frist

 

Anything between £250-£500, Ker-ching

 

Unlikely but they were all stuck but now freed off what could i use to lube them ?

Thanks very much to you and steve euan.

 

Well done, you should be warm and toasty now!

Theres no need to lube them because they stick internally, turn them up and down now again, or give them a good whack if they stick again! LOL

 

Will do m8 thanks again.

 

I was wrong

you could just take the heads off for a while then the valves acant shut and jam

 

if ur brave u can pull the pin outwith a pair off pliers put some grease on the pin and push it back in but have an old sheet and some kitchen roll ready once back in move out and in a few times to free up the valve