Boiler Breakdown Sticky

[Ollieg]

Vaillant Eco tec plus 2 (new ecotec)
F70
Check coding resister (on harness right hand side of main heat x)
Check gas type plug on pcb
Check all cable plugs for poor connections.
Check plugs with any faults. female connections spread open causing poor contacts.

 

[Whyme]

vaillant eco techs F75 fault is always always the water pressure blocked..

 

[Super Mario]

i like this thread BUMP!

 

[Koogatubac]

Great posting guys!!

 

[Dotty]

With thanks to Gasmanrob!

 

[buckley plumb]

Glow worm cxi no display or lights board check.




If there is no display, there are some other things ratherthan the boards which can take the display out.

Any of the low voltage components can also do that, so wealways say to disconnect the 3 connections on the left hand side, J1 J4 and J2and see if the display comes back, if it doesn't then you need to ease J13 offthe top centre so you can see the metal tracks underneath, and see what voltageyou are getting on the first track on the right hand side. It should be reading15-16 volts DC, this is the feed to the display board by the main board so ifyou are not getting that then it is the main board, if you are then it is thedisplay board.
Most of the time we do recommend in changing them bothtogether as some of the new software doesn't always like the old software, soeven if if you do or don't get the voltages it still might need both boardsreplacing.

 

[Rizme]

Vaillant 824e Turbomax Plus comes up with fault code F28. Did all my resistance and voltage check and still nothing happening. It goes all the way to ignition but does not fire. Hence decided will go next day with a new gas valve, turned up next day without one just wanted to check what could be wrong, when I took it out it had water in it. Don't know how it got in there. But after drying it out everything working perfectly fine. Saved few bobs for the customer and earned few more for myself.

 

[JamesyGoosey1]

I went to a ferrolli optimax he locked out on f37 low pressure there was presure in it and no blockage to the low pressure switch changed the low pressure switch still the same spoke to ferrolli it's no low pressure it's caused by a power surge to the board to get it to reset " press reset for 10 sec wait for ts,press reset and let go immediately it will show p1, press bottom + once p2 will display, press top - to go back to p1, 00 will appear( it needs to be 01) use top + &- to change then press the bottom + once to back to p2, then press top + and 01 should be displayed then press and hold reset for 10 sec and it should be reset! Hopefully will save someone 40 quid for a Low pressure switch

 

[galaxy_plumbing]

oh boy, already got head ache from reading it

 

[JamesyGoosey1]

Haha I know I had headache writing I should av just put fault code f37 don't change low water switch ring ferrolli