Bled a radiator last night and heating not working now

newaccount2017

Hi. I bled a radiator last night when the heating was on. Today the heating isn't working. I'm guessing I caused an airlock or something. Are radiators not supposed to be bled when the heating is on? I have an outdoor Firebird Envirogreen. Does anyone know if I can fix this problem or would I need to call a plumber? When I turn the heating on now, I can hear gurgling like it's on but no radiator heats up.

Duke of Url

I did this before. Called a plumber out who told me I was supposed to open a water valve somewhere in the hot press when bleeding the radiator. I had left it closed and let too much water out of the system. He opened the valve and bled the system which fixed the issue.

newaccount2017

I just checked the hot press where all the heating stuff is and there's a dial with a black hand pointing to zero and a red hand pointing to 2.5. I wonder if that means anything.

Duke of Url

newaccount2017 wrote: »

I just checked the hot press where all the heating stuff is and there's a dial with a black hand pointing to zero and a red hand pointing to 2.5. I wonder if that means anything.

I have no idea. I just called a plumber as I knew I funked up. He told me exactly what I had done over the phone and he called out and fixed it.

TheChizler

Black dial indicates there's no water pressure in the heating system. You need to open that filling loop valve until there's pressure on the system, normally at least 1 bar for most boilers. I'm surprised so much pressure was lost by bleeding the radiator, do you have an expansion vessel?

https://www.google.com/search?q=expansion+vessel

CoBo55

You’ve let the pressure out of the system which is indicated by the black hand, you need to find the water filler and let water into the system until it’s showing about 1 bar when it’s cold. The red hand is just a marker you can move by turning the outside surround of the gauge.

newaccount2017

Yeah, I have one of those expansion vessels.

jimf

its also possible you have tripped the high limit stat on your boiler

as advised above already you need to bring the system up to I bar pressure on the black hand then bleed your rads until you have water from them

check pressure again and adjust back up to .75 to 1 bar pressure

https://heatingpartswarehouse.co.uk/product/imit-tlsc-dual-thermostat/?gclid=EAIaIQobChMI8ena65_z6gIVGODtCh08fQm4EAQYASABEgK_rvD_BwE

this is a pic of your boiler stat unscrew the little black cap and press button underneath to reset hl stat

Duke of Url

TheChizler wrote: »

Black dial indicates there's no water pressure in the heating system. You need to open that filling loop valve until there's pressure on the system, normally at least 1 bar for most boilers. I'm surprised so much pressure was lost by bleeding the radiator, do you have an expansion vessel?

https://www.google.com/search?q=expansion+vessel

CoBo55 wrote: »

You’ve let the pressure out of the system which is indicated by the black hand, you need to find the water filler and let water into the system until it’s showing about 1 bar when it’s cold. The red hand is just a marker you can move by turning the outside surround of the gauge.

I agree with these 2 lol

jimf

TheChizler wrote: »

Black dial indicates there's no water pressure in the heating system. You need to open that filling loop valve until there's pressure on the system, normally at least 1 bar for most boilers. I'm surprised so much pressure was lost by bleeding the radiator, do you have an expansion vessel?

https://www.google.com/search?q=expansion+vessel

possibly low anyway before he bled it

you would think 1 rad been bled wouldn't cause the issue

newaccount2017

jimf wrote: »

its also possible you have tripped the high limit stat on your boiler

as advised above already you need to bring the system up to I bar pressure on the black hand then bleed your rads until you have water from them

check pressure again and adjust back up to .75 to 1 bar pressure

https://heatingpartswarehouse.co.uk/product/imit-tlsc-dual-thermostat/?gclid=EAIaIQobChMI8ena65_z6gIVGODtCh08fQm4EAQYASABEgK_rvD_BwE

this is a pic of your boiler stat unscrew the little black cap and press button underneath to reset hl stat

I just checked and I don't seem to have that boiler stat. I'm going to take a few photos of what I have and upload them. Thanks everyone for the help so far.

newaccount2017

These are the pics I took:
https://imgur.com/a/5GWrDr4

jimf

newaccount2017 wrote: »

I just checked and I don't seem to have that boiler stat. I'm going to take a few photos of what I have and upload them. Thanks everyone for the help so far.

that stat will be out at your boiler

newaccount2017

jimf wrote: »

that stat will be out at your boiler

You were right. I found it outside when I opened up the boiler. I unscrewed the black cap and pressed the button underneath but nothing happened.

newaccount2017

The heat is working now although the bar is still at 0. I don't know what happened but thank you everyone, it'll keep me going til I call the plumber. I don't trust it anymore though

Nigzcurran

newaccount2017 wrote: »

The heat is working now although the bar is still at 0. I don't know what happened but thank you everyone, it'll keep me going til I call the plumber. I don't trust it anymore though

Have you a hot press or similar area with all your pipes?

jimf

newaccount2017 wrote: »

The heat is working now although the bar is still at 0. I don't know what happened but thank you everyone, it'll keep me going til I call the plumber. I don't trust it anymore though

it sounds like your boiler etc is ok

your system is low and has no water to circulate around to the rads


your boiler is getting up to temp and cutting out until you sort the pressure you wont be able to run the heat

newaccount2017

Nigzcurran wrote: »

Have you a hot press or similar area with all your pipes?

Yeah, I have a hot press with all the pipes, they're in this picture:
https://imgur.com/a/5GWrDr4

newaccount2017

jimf wrote: »

it sounds like your boiler etc is ok

your system is low and has no water to circulate around to the rads


your boiler is getting up to temp and cutting out until you sort the pressure you wont be able to run the heat

What's weird is that my hot water in the kitchen sink tap just dribbles out at times. I've been meaning to call a plumber and get all of these issues fixed but now I'm thinking that there's a connection between that and my central heating. The bathroom taps are fine, it's just the kitchen sink hot water tap.

colm_mcm

See the black knob to the left, pointing downwards?

newaccount2017

Yeah, should I turn it? When the heating is on?

colm_mcm

I’m not a doctor, but I’d turn it while the heating is off.

newaccount2017

I turned it earlier when the heating was off but it didn't seem to do anything to the black pressure gauge, that was still at zero. So I just readjusted the black knob back to the way it was first then.

colm_mcm

You may need to wait for it to go above zero. You should also be able to hear water moving through.

newaccount2017

Ok, I'll try that in the morning. Thanks for your help, much appreciated. I'm afraid to try it now because the heat is working and I want to heat the house as much as possible now in case it konks again.

colm_mcm

It’s a bit silly running it when you know it’s got low pressure.

jimf

when you pressed the little button at the boiler earlier had you the heating turned on inside at timer

newaccount2017

colm_mcm wrote: »

See the black knob to the left, pointing downwards?

I had the black knob loosened today for a few hours but it made no difference to the pressure gauge.

TheChizler

Should only be for a few seconds, never leave it open unattended. Did you open it all the way? You should be able to hear water flowing and the pressure should shoot up

jimf

those valves can go faulty

if you overfill the system your safety valve will pop

time for a plumber me thinks

John.G

The lock nut can be slackened and the adjusting spindle screwed down clockwise very very slowly with the black knob open, if no rise in pressure then either no or low mains pressure available, or maybe supply is from the cold water storage tank which should still give ~ 0.5 bar, ensure black knob closed afterwards before leaving as advised above.