Ideal Logic - No water flow Lockout

21 May 2011
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United Kingdom
Hi All,

I recently moved into a new house and after a week we are getting the error message "No Water Flow Lockout" on an Ideal Logic Plus Combi.

I have checked the pressure and that looks ok - its almost 2 bar. My wife said when she couldn't get hot water earlier she "tried to boost the pressure"

Any Ideas? Can anyone also just check all the valves are the right way round - ie open where they need to be?

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New house? What a poor install and poor boiler. She’s increased the Central Heating pressure. Thinking it would boost the HW?

The blue handle above the white pipe needs opening fully.
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As soon as the boiler is switched on it says No Water Flow Lockout...fill system to and it never fires, the burner never lights up. I am getting cold water from the hot tap - so its flowing.
You need an engineer . Either the pump is seized ,or failed ,or the part within the boiler that senses the water flow is suspect.
I assume it doesn't fire up for central heating either ?
Just noticed as well, there is a black rubber nipple on the underside of the boiler near the front, its slightly wet to touch. I noticed some drips on the floor
The blue handle above the white pipe needs opening fully.

I don't think so - that blue valve is the heating filling loop isolator, and should be SHUT.
The cause of the complaining boiler has been covered by others:
1. Faulty or blocked flow turbine - needs a Gas Safe fitter to remedy
2. Failed pump - needs a Gas Safe fitter too

OP, terryplumb has asked you a question - does the boiler work when heating is demanded? Answering it won't make your boiler work, but it may go some way towards answering your next question - "What do you think is wrong with it?". So far there are two possible failure modes, and each requires a Gas Safe fitter to rectify.

For those about to argue, the front cover on this boiler forms part of the flue system, and a correctly functioning (and verified so) seal is mandatory to meet the Gas Safety (Installation and Use) Regulations.

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