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The panel on my Baxi combi boiler shows a tap for water and a radiator for central heating. The rad constantly flashes. Is this normal?BillS

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: vokera combi boiler

air in system

Posted on Aug 11, 2008

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SOURCE: COMBI BOILER /CENTRAL HEATING

the boiler should modulate to controll the radiator temperature but the central heating will go off whilst you are drawing hot water

Posted on Nov 27, 2008

  • 3 Answers

SOURCE: combi cutting out and overheating

is this a baxi 105? chances are you diaphragm has gone on your diverter valve. Or your diverter valve.
Do you will initially get a liitle hot water if your heating is on?

Posted on Dec 30, 2008

zeusfaber
  • 247 Answers

SOURCE: Combi Boiler pressure gauge reading 0, and radiator half on!

The first thing you need to do is to put some more water into your heating system. This is usually done by allowing water from your (pressurised) domestic cold water supply to flow into the system: On older boilers, this is done with a connection (often made with a removable hose) on the pipework just outside the boiler. Newer boilers may have a built-in connection with some sort of removable link (sometimes looks like a plastic key).

Once you've got the boiler up to working pressure (typically about 1 bar - 15 psi), you should be able to bleed your upstairs radiator properly.

This may be all it takes, though the pressure excursions you're getting when you run the hot tap suggest there may be another problem. See what happens to the pressure as the boiler heats up and cools down. There really ought to be very little pressure difference between the two conditions. If you see significant changes, this usually means that the "pressure vessel" (or in hydraulic terms, system accumulaor) has lost its air charge.

The pressure vessel is a metal container inside the boiler, usually painted in red enamel. Somewhere near the top, you will find a schrader valve (like the one on a car tyre), and you can use this along with a tyre pump to replenish the air in the top of the vessel. This will reduce your pressure transients for a while, but you need to keep an eye on it. If the problem returns, you probably need to replace the pressure vessel (or clag another one into the plumbing alongside the boiler).

A.

Posted on Feb 03, 2009

  • 16 Answers

SOURCE: baxi combi 80 e it takes 12 seconds after turning

it could be a blocked hot water plate heat exchanger

Posted on Aug 17, 2009

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My central heating turns off when i turn the hot water tap on. when i turn it off the central heating doesn't come back back on until i turn the power off and on.


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Feb 09, 2016 | Water Water Heaters

2 Answers

Central Heating\which combi boiler?


HI right first i would look at a worcester greenstar combl
best you can get and you have full back up from worcester leave all rads with stats as they are i think you will have to remove one , the that would be the bath room also the greenstar comes with a clock bulit in these are on the worcester bosch web site i have been a gas fitter fot 30 years and this what i would go with a really good combi, you can also get awire less room thermostat for this hope this helps

Feb 01, 2010 | Desa International CBN30T Central Heating...

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

Hi there i have old baxi boiler i was wondering


pilot has to be on all the time on this baxi ,piolt might be a bit large might need adjusting down

Oct 05, 2009 | Combi Centre DX - Mango

1 Answer

Heatslave diverter valve


clicking rads are due to pipe expansion when getting hot.
If the hot water [secondary circuit] gets hot and the boiler stays on [does not keep going on and off] even with a constant low water flow then the diverter should be ok.
there is a valve to prevent the primary circuit [central heating] [ CH] from sending water to the rads. this or its control may be at fault.
both the
Both the CH pipes to & from the boiler should have manual valves to turn off. do this then try the hot tap-full on. If the boiler goes into overheat mode and the overheat stat kicks in to turn the boiler off -- then :-
Check also the heat exchanger, it may be furred up especially if you are in a hard water area. It means taking it off and manually checking [pour water through] If you're lucky it will be just muck to be forced out with hose pipe pressure, if not a new one

Sep 06, 2009 | Water Heaters

1 Answer

Re: combi boiler.


if you have hot water at the taps but the heating isn't working make sure the thermostat is set high enough for the boiler to run check the time clock settings are on.
if these are working it could be a faulty diverter valve switch not sending a signal to the boiler to run.

Mar 23, 2009 | Water Heaters

1 Answer

RAds don't get hot anymore


rads not heating could be down to old system ie pipework etc and sludge building up. r there any cold spots on rads? when boiler turning off do u mean going to reset? if so could be over heat prob at boiler . there should be a pressure pipe coming from boiler going to outside if its a combi. if this is leaking your expansion vessel might need re charged as this is where the water will be going.

Feb 05, 2009 | Combi Centre DX - Mango

1 Answer

Combi cutting out and overheating


is this a baxi 105? chances are you diaphragm has gone on your diverter valve. Or your diverter valve.
Do you will initially get a liitle hot water if your heating is on?

Dec 22, 2008 | Water Heaters

1 Answer

COMBI BOILER /CENTRAL HEATING


the boiler should modulate to controll the radiator temperature but the central heating will go off whilst you are drawing hot water

Nov 13, 2008 | Water Heaters

2 Answers

Ariston combi boiler


sounds like your diverter valve is passing on the boiler, this diverts the heat either to the rads or to the taps, if its passing through the heating chanel it'll heat up the rads- may also be a scaled up secondary heat exchanger, hope this helps you

Aug 21, 2008 | Combi Centre DX - Mango

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