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Brian, Plumber
Category: UK Plumbing
Satisfied Customers: 841
Experience:  16 yrs. experience as plumber, including full bathroom and kitchen installations.
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We have a glow worm flexicom 18sx. It is giving us an f9

Customer Question

Hi, we have a glow worm flexicom 18sx. It is giving us an f9 error message. We have resetting but it doesn't fix the problem. System briefly reads post reset that it's at 1.3bar.
Submitted: 2 years ago.
Category: UK Plumbing
Expert:  Brian replied 2 years ago.
Hi, my name is***** have been in the plumbing & heating trade for approximately 15 years. I will be helping you today.
Hi as far as i am aware F9 is a flow problem if it doesnt sense a good flow through the boiler of at least 0.2 bar it shows an F9 error
This could be numerous things.
1 dirt in the system (sludge build up)
2 pump faulty
3 flow sensor
4 pcb

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