Couple of rads taking ages to warm up

987654

I live in a 3 storey house & a couple of the rads - one on top floor & one on bottom floor take ages to get warm. The heating is set for twice a day & sometimes these don't come on at all.

Some of the rads are slow to warm, but not as bad as these.

I think I need to call a central heating engineer but don't want to be ripped off - any ideas (the pump is working, in fact it seems to be running all the time when the heating is on - should it?).

I'm finding that I'm leaving the heating on longer cos of this - so not moneysaving!

tigtag02

have you tried bleeding them?

987654

Yes, no air in any of the rads.

When they do warm up, the top is hot but the bottom cold.

keystone

987654 wrote: »

I live in a 3 storey house & a couple of the rads - one on top floor & one on bottom floor take ages to get warm. The heating is set for twice a day & sometimes these don't come on at all.

Have you got Thermostatic Valves on these two rads? Take the head off and make sure that the valve isn't stuck through lack of use over the summer.

Some of the rads are slow to warm, but not as bad as these.

Ditto TRVs. When was the system last balanced? How are the others - do they get nice and hot?

(the pump is working, in fact it seems to be running all the time when the heating is on - should it?).

Yes and it should also continue to run for a while after the boiler shuts down to ensure that residual heat close to the boiler is distributed around the system.


Cheers

gordikin

If they are colder at the top than they are at the bottom they need to be bled. If the are just generally colder your system may need flushed out.

keystone

987654 wrote: »

When they do warm up, the top is hot but the bottom cold.

That might just imply they are sludged up and the system needs a clean. How old is the system? Has it evere been flushed to your knowledge?

Cheers

987654

About 8 years old & never been flushed in the 6 years I have lived here.

Have tried to bleed them but no air comes out, just water.

They do have valves on, but they are getting warm occasionally so don't think they are stuck.

987654

bump (now everyone is up!)

EliteHeat

There are many, many, many threads on this subject. Or, there is always this, a mere 1.8 million results.

Or, if the thread runs it will go along these lines:-

• You need a powerflush
• No you don't
• BG charge £800 for this
• Robdogs, a privateer would only charge £350
• Put a magnetic filter on it, I did and never looked back etc
• Can I powerflush myself?
• Yes, it's easy
• You don't need a powerflush etc etc
• Have you bled the radiators?
• Cor, these plumbers/plummers/plumpers, I'm in the wrong job me

hth

keystone

987654 wrote: »

bump (now everyone is up!)

Have you checked the TRVs as suggested. What about the balancing? I have a feeling EHs advice is best with this system.

Cheers

keystone

EliteHeat wrote: »

Or, if the thread runs it will go along these lines:-

• You need a powerflush
• No you don't
• BG charge £800 for this
• Robdogs, a privateer would only charge £350
• Put a magnetic filter on it, I did and never looked back etc
• Can I powerflush myself?
• Yes, it's easy
• You don't need a powerflush etc etc
• Have you bled the radiators?
• Cor, these plumbers/plummers/plumpers, I'm in the wrong job me

hth

:rotfl::rotfl::rotfl: