Rads very slow to heat up

celticbhoy27 · 13-12-2016 4:57pm #1

Hi all got a new grant boiler couple of years ago. Thing is when i turn it on, it takes over an hour for the rads to heat up. I have it timed to come on in the mornings at half 6 but its close to 8 before the rads are hot. Any ideas what the prob could be?

nelly17 · 13-12-2016 5:00pm

Did you bleed the rads in-case there is air in the system?

celticbhoy27 · 13-12-2016 5:01pm

nelly17 wrote: »

Did you bleed the rads in-case there is air in the system?

Yeah all rads bled, not that anyway

nelly17 · 13-12-2016 5:02pm

Well that's me out of ideas

K.Flyer · 13-12-2016 5:31pm

It sounds to me as though the balance valve on the cylinder is fully open, incorrectly set, not fitted or there are issues with your circulation pump or overall circulation issues.

celticbhoy27 · 13-12-2016 7:19pm

K.Flyer wrote: »

It sounds to me as though the balance valve on the cylinder is fully open, incorrectly set, not fitted or there are issues with your circulation pump or overall circulation issues.

Would it look like this (balance valve) it was fully open so ive tuened it half way! Wont know if makes a diff as wont have heat to come on til morn

celticbhoy27 · 13-12-2016 7:24pm

Pic

jimf · 13-12-2016 7:50pm

what k flyer said

do you have plenty hot water

celticbhoy27 · 13-12-2016 7:51pm

jimf wrote: »

what k flyer said

do you have plenty hot water

Yeah hot water is fine. Would that valve look like the pic linked? Thsnks for help btw

TheRiverman · 13-12-2016 7:56pm

celticbhoy27 wrote: »

Would it look like this (balance valve) it was fully open so ive tuened it half way! Wont know if makes a diff as wont have heat to come on til morn

Surely you turn it on manually for testing without waiting for your timer to come on in the morning.

celticbhoy27 · 13-12-2016 7:58pm

TheRiverman wrote: »

Surely you turn it on manually for testing without waiting for your timer to activate in the morning.

Not sure what you mean. It doesnt matter if its switched on timer or manually. The boiler is running away for over an hour before heat kicks in to them. Edit. Do you mean turn it on now? Stove has the rads warm so no point testing now

jimf · 13-12-2016 8:01pm

I think what riverman means is to turn it on for maybe 20mins if its just the balancing valve is the issue you will know by then

TheRiverman · 13-12-2016 8:03pm

celticbhoy27 wrote: »

Not sure what you mean. It doesnt matter if its switched on timer or manually. The boiler is running away for over an hour before heat kicks in to them

What I mean is switch in on manually now to check if half closing the valve has made a difference to the time it takes the rads to heat up.

TheRiverman · 13-12-2016 8:11pm

I have both solid fuel (stove) and oil central heating.The valve has to be almost fully closed to get maximum heat in the rads from the oil system.

Dtp1979 · 13-12-2016 9:44pm

TheRiverman wrote: »

I have both solid fuel (stove) and oil central heating.The valve has to be almost fully closed to get maximum heat in the rads from the oil system.

When your oil is on by itself, are the stove pipes heating up?

Rads very slow to heat up

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