Baxi boiler red light after water switch off

Neil Henry · 30 Mar 2019

Morning guys,

How would I rectify this. Installed a new bathroom sink yesterday, turned water off and drained it, but when switching the heating back on it sounded like someone was kicking the pipes (air most likely)

The red light flashes on the boiler and won't go off.

The boiler is a Baxi 18HE

kidgreen61 · 30 Mar 2019

Assuming you drained the hot water pipe to fit your new basin, then I don't see how the two are connected, you don't have a combi boiler.

Have you tried the reset button on the boiler?

Neil Henry · 30 Mar 2019

Yes I have. Makes a load of banging and then goes back to red after about 2 mins.

ianmcd · 30 Mar 2019

The HW that comes out of your basin tap does not connect to the boiler in any way, you have done something else, when you say you turned the HW off what exactly did you do and where did you drain it from

Neil Henry · 30 Mar 2019

I Turned the cold water off at the main valve. Turned the heating off and then switched hot and cold taps on to drain the system to replace the taps.

ianmcd · 30 Mar 2019

if you did that the hw tap would take an age to drain as you would have had to empty the cold water storage tank, that is in your loft, you are not telling us everything, could be an airlock, but shutting off the cold main inlet would not stop the HW supply untill the cistern in your loft had emptied

dilalio · 30 Mar 2019

Plumber's Curse... You didn't touch it but it occured whilst you were working on a completely unrelated part of the facilties and is therefore your fault!

FiremanT · 30 Mar 2019

Probably a bit left field, but is this a completely new sink job or a replacement.?

If a replacement, I trust you have connected to hot and cold, and not to the CH pipes?

mcmoby69 · 30 Mar 2019

primatic cylinder maybe?

stuck pump, pure coincidence?

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Baxi boiler red light after water switch off

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