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Back boiler rads working upstairs but not down stairs

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  • Heating & Co... Master
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Check you pump see if its working , check leval in small tank in the loft could be dry , ball valve stuck in closed postion

Posted on Dec 08, 2012

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Posted on Jan 02, 2017

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SOURCE: I have a Potterton Prima F50 boiler and it fires

Don't have a problem

Posted on Nov 26, 2009

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SOURCE: ideal classic boiler no heating only hot water

Hi I have some boiler problems, I`m the proud owner of an Ideal classic SE12ff. The controls are that of Sunvic select Xl.
The problem is I can only get the hot water to work when the heating is on, I neglected this over the winter but now the summer is apparently fast approaching I am desperatley trying to get this solved. A plumber has done some fault finding with no prevail, have you any suggestions?

Posted on Apr 23, 2010

  • 4736 Answers

SOURCE: radiators dont get hot down stairs,just changed

I don't think the repairs you just completed have anything to do with the problem. There may be air in the water lines to the downstairs radiators, which will need to be purged out. Or there is not enough water, in the furnace's storage tank. Or, perhaps the downstairs radiators have inadvertently been turned off. If each radiator has it's on thermostat, the relays may be at fault.

Posted on Feb 08, 2011

SOURCE: just moved in yesterday and

Sounds like the programming on your thermostat needs to be reconfigured, but I need more information like the Honeywell Model number which can be found behind the front cove, but becareful to unsnap the t-stat properly not to damage the pins that connect t-stat to its base.

Posted on Jul 25, 2011

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My upstairs temperature is 80 degrees and the downstairs is 69 Honeywell focus pro th6000 is set at 69. Why is the upstairs so drastically hot?unit is located upstairs& thermostat is downstairs


if there is no control of air movement between floors and you have it on cooling then any cold air will go down to the lower floor
or alternately if you have it set on heating all the hot air will rise to the upper floor
where is the system located (upstairs or down stairs ) and where is the thermostat located
to get control close any upstairs to down stairs doors or erect a heavy curtain across the stair well

Dec 17, 2016 | Honeywell Heating & Cooling

1 Answer

Back boiler ,rads work upstairs but noy down


Check out your pump sounds like its not working

Dec 08, 2012 | Heating & Cooling

1 Answer

New Vaillant 360 eco plus boiler, takes almost 3/4s an hour for rads to come up to a decent temp. Hot water is fine. Called out install Engineer who is an excellent tradesman but he says everything


We have just had our old system boiler replaced with a vaillant ecotec plus 837 and sounds like a similar working operation to ours. At first I was a little concerned,but I was told by our installer that he was told by vaillant that these very latest boilers size the system on start up for about 10 mins, then take temperature to target flow which you set boiler at. So even by setting target flow temperature very high you still get the initial sizing cycle, which ours was about 30-35c temp. These boilers seem to run biased for efficiency as after a while they modulate the boiler burner down and the radiators run more on the side of warm than really hot like the old type boilers. You also get better efficiency as at lower temperature the boiler condenses better. You will also find you get a more constant temperature in your home rather than over shoots. I was concerned at first, shame there was no info/explanation in user manual as people do need to know that this is normal operation. We are used to ours now, took a month and by the way these boilers can make a creaking noise but was told this normal expansion/ contraction but annoying when sited in bedroom cupboard. Best of luck!

Oct 27, 2012 | Water Heaters

1 Answer

I have hot rads upstairs but down stairs 2rads cold the boiler comes on for 2miniuts theh cuts out and starts again


two things. 1 check the air vents on your radiators to make sure they are open to allow the steam in. Where is your thermostat in relation to the working radiators if the thermostat gets satisfied too quickly you won't have time to heat the other radiators. Steam rises and it is normal for upper radiators to get hot a little earlier

Dec 21, 2010 | Heating & Cooling

1 Answer

I can only get heating to the radiators upstairs, not downstairs


balance the rads.
upstair radiators turn all valves off,heat will then divert downstairs,open valves upstairs 4 turns on locksheilds and number 4 on trvs if u have any.
then if that does not work get a combi or powerflush.
if u cant afford then drain a little from rads,get x300 sludge remover from plumb shop and put in header tank(not hot water tank).
then fill system up and repeat balancing.

www.jollygreenplumbingmachine.co.uk

Dec 26, 2009 | Desa International CBN30T Central Heating...

1 Answer

Baxi 80 e some rads hot others cold


is the pump running or is there an air lock near to the boiler check water tank in loft the smaller one to make sure you have water in the system

Apr 24, 2009 | Combi Centre DX - Mango

1 Answer

3 out of 7 rads working with hot water


This is a flow problem within the system and you have ruled out the two major problems already.
asuming the pump has been fitted in the correct way round and the pump isolation valves are open fully. have you tried closing down the radiator valves upstairs and forcing the flow around the downstairs circuit? also is there any zone valves on the circuit not opening.
Is it a conventional type system with a header tank ?

Feb 01, 2009 | Heating & Cooling

2 Answers

Upstairs rads r cold appears to be no pressure 2 vent rads


you have air lock in top floor rads must bleed it out start with the one closest to boiler and work your way out to what you figure is the end of line as best you can figure

Dec 03, 2008 | Water Heaters

1 Answer

Baxi Boiler not firing, pilot light ok


first check the pilot is alight, it sounds like it is cause you can hear the boiler click. that click is the gas vale solenoid trying to open, if there is 240-230volts at gas valve when you here the click and pilot is alight the gas valve is broken. if you test for voltage look on the gas valve and see if its 240 or 24v obviously if it 24 v check for 24 volts, let me know

Nov 11, 2008 | Combi Centre DX - Mango

1 Answer

My oil fired central heating system has stopped heating up stairs.The rads and pipes have been flushed out,when the system was refilled the upstairs rads heated ok untill the system was switched off for...


Since you have done a good job bleeding the system, I will suggest that the impeller on the pump is bad. Many times these will simply deteriorate in the volute causing the symptoms that you describe.

This looks like it is in the wrong forum. Try reposting this in the heating section of the FixYa web site to get more responses.

Jul 03, 2008 | Heating & Cooling

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