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get yourself a proper engineer who knows,about Vaillant boilers, he,s talking a load of sh--

If the condensate is flowing then the syphon is full and should be ok

S codes are not error codes,they are status codes S7=pump over run. S1-4 = Ignition sequence S4 Boiler on Can you confirm boiler ignites at S4

beat me to it only by 1min though :P

Make sure both filling valves are Closed under the boiler :oops:

Then bin it :lol:

As dcawkwell has said. F22 = Low or no water in appliance, Pump defective Any engineer worth his salt should be able to rectify this fault.

Well did u check the fuse? :wink:

I know mickyg you asked first,but I am willing to travel from Wales if he,s giving/scrapping this top of the range boiler :wink:

What controls have you got,is it a y plan or s plan? :|

Set the thermostat at 22deg for it to come on. set it at 6deg for it to go off "simples" :lol:

Not unless you can give more info;ie;what boiler,what system,etc; :roll:

Read the above again connect to 3+4

My money is still on the main gas valve solinoid,as poster has said,"pilot is lit" :wink:

gas valve solinoid is on its way out,unfortunately you can not get the solenoid separately for this gas valve,its a new gas valve :roll: And it,s just a coincident,nothing to do with the fan

Yes, try plumbcenter or any good plumbing merchants :wink:

But you have allready been given a solution :!:

So alls well then :lol:

If you remove the PCB cover,you will see L.N.E connected to #s 1.2.3 connect your roomstat to 3+4 for 2 wires 3.4+5 for three wires. Bobs your uncle :lol:

Turn the power off first :oops: