HOW TO GET RADS HOT

[Andy26]

RADS COLD AT THE BOTTOM.
HAVE INCREST PUMP TO MAX.
TRYED BALANCING & EVERY THING I CAN THINK OF WITH THE TOP & BOTTOM VALVES.
THE RADS ARE PLUMED IN WITH OUTLET AT TOP OF RAD
INLET AT BOTOM OF RAD.
BOTH INLET & OUTLET PIPES ARE ON THE SAME SIDE OF RAD ONE TOP ONE BOTTOM IS THIS RIGHT?
THANKS ANDY.................

[smurf]

have you tried bleeding them to get air out

[smurf]

ok often have the problem

[boxtops]

I was going to say that too - our rad at the top of the house is nearly always cold, bleeding the valve usually brings out half a rad full of air, then bingo! hot rad.

[smurf]

or if you have stats on the rads you might have to take top off stat and give it a slight hit with hammer as they sometimes get stuck

[scotman]

If system needs bleeding then the rads would be cold at the top.

[smurf]

o scotman are you trying to say that us mere females dont know what we are talking about , bleeding is worth a try

[boxtops]

That's what I said, scotman - cold rad + bleed = hot rad

[boxtops]

^ ah, no - I see what you mean - rad cold at BOTTOM but hot at top could be something else.....

smurf - I like your "slight hit with a hammer" !

[smurf]

weel maybe a tap on the pin would be a better description for these mere males

[The Builder]

I can't think why anyone should want to connect a rad in that way Andy. Has it worked ok in the past?
Technically it's alright, but the valves should be located diagonally, so you would have inlet bottom left, and outlet top right. This would give a proper crossflow. If a rad was, say, 1800mm long but only 500mm high, then I can't see how the "other" end would ever get any hot water.

Anyway........... cold at the TOP normally indicates bleeding needed....... but, with your arrangement, all bets are off. Gawd knows where the cold spot would be with this set-up. Try a bleed.

[smurf]

after some research have been told that if it is the stats you can with a pair of plyers take the pin out and give it a good clean that will stop it sticking

[rov1100]

We had a similar problem with our radiators. What we did was buy a small can of the flushing agent and tipped it into the small overflow tank in the loft. Next Winter we had boiling hot radiators and must have saved us a small fortune in heating costs.