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Valiant Pro showing f28 fault

I have a new valliant pro boiler showing a faulkt code of f28. It ignites then switches off after about 5 minutes. I have checked the rads but on one there was a leak coming from the thermostat. Its lost lots of water. The carpet is saturated and it was dripping into the living room. The rad is in the bedroom....

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Wrong category

Posted on Jan 18, 2013

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: hi my vaillant eco tec pro shut down last night

Got exactly the same problem with mine. Manual says f28 = fault in gas supply, gas pressure too low. Boiler will ignite but goes out within minutes? HELP!

Posted on Jan 08, 2010

  • 104 Answers

SOURCE: vaillant eco tec pro 28

IF the weather is extremely cold, and you're getting F28, the external pipework may be blocked with ice. Warm up the external pipes (lag them if you can) - and now see if your boiler will re-ignite.

A friend fixed our condenser boiler with this tip - hope it helps you.

Posted on Jan 09, 2010

  • 36 Answers

SOURCE: hot water only warm no faults showing radiators ok

you need a new dhw thermistor

Posted on Jan 24, 2010

  • 36 Answers

SOURCE: its a vaillant condensing gas boiler, it is

f:28
air in gas
gas rate low
could be gas valve faulty,ignition transformer,ignition cable.
if there is a spark then its your gas valve,if no spark then check continuity on harness and spark generator,also check earth to appliance

Posted on Jan 25, 2010

  • 4 Answers

SOURCE: KDS Valiant No Video at desktop (WinXP Pro)

solution found
download kds valiant 6000 series winzip
from driversguide.com
get the bios update,send to floppy and boot from floppy,to update the bios.
working fix!!!!!!

Posted on Oct 02, 2010

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Turn the power off at the wall , wait 60 seconds and the boiler will automatically reset.

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Technical enquiries 01634 292392 or technical@vaillant.co.uk

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6 Answers

Vaillant eco tec pro 28


IF the weather is extremely cold, and you're getting F28, the external pipework may be blocked with ice. Warm up the external pipes (lag them if you can) - and now see if your boiler will re-ignite.

A friend fixed our condenser boiler with this tip - hope it helps you.

Nov 14, 2008 | KDS Valiant 6380iPTD-01 Notebook

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