valliant ecotec pro 28 boiler

[wemyssie]

hi there after reading all similar posts my boiler is not working

it say s97 and i can get into the d modes but after that i am stuck

it comes up with a f.75 error which i believe is common but i canr get an engineer out till wednesday and have no heat or hot water

 

[yerino]

Why are you trying to get into the diagnosis settings for?

 

[wemyssie]

i was trying to see if i can at least overide the system so i can get hot water on

 

[yerino]

Start from basics.

What is the pressure gauge reading on your boiler?

 

[wemyssie]

1.2 bar

thanks

 

[yerino]

Press the + and - buttons together.

Does this fire up the boiler?

 

[wemyssie]

when i push them together i get a sf.h or 5fh

 

[Phill Peck]

Sounds as though your pressure sensor is blocked Or your pump has failed

 

[wemyssie]

i have a enginee out on wednesday is there anyway posss to bypass this block as i really need hot water not too worried about heating
all the pipes under the boiler are cold

 

[Phill Peck]

If it is a blocked pressure sensor it is an easy fix but depends on your ability

You could try to increase the pressure to around 2 bar this will sometimes help.
If you turn the boiler off and then on again can you hear the pump run?

 

[wemyssie]

yeah it whirrs into life goes thru the same cycle 3 times it lasts roughly 60secs then the red light comes on and the f75 error comes on

 

[Phill Peck]

My long distance diagnosis would be that your pressure sensor needs to be cleaned or replaced. It is a simple job for a qualified engineer.

Try with a bit more pressure (2bar) but if that doesn't work then your gonna have to wait for your engineer or find another one that can come sooner

 

[wemyssie]

how do i get more pressure

 

[Phill Peck]

Silver braided hose with valves at either end open both valves but only for a couple of seconds then check the pressure again

Don't take it above 2.0 bar

 

[wemyssie]

inside the boiler i presume??