I'm getting a f75 error on my vaillant Eco tec plus boiler. To get around the error, I have been draining some water out of the system, and then adding pressure via the filling loop. This gets around the error but then after a day or two the f75 returns.
I do have British gas home care, I have had three engineers around and the last guy changed the pressure switch/sensor but then told me that I would need an external expansion vessel and BG power flush before they would come out again. The work would cost approx £1000. I advised them that I already had the system flushed 6 months ago, but the BG engineers claimed it had not been done correctly.
Anyway, I decided to get the expansion vessel fitted, as I do have 15 radiators in my house and reading info on this on the web it seemed sensible. I used an independent gas engineer to fit 25l vessel. He told me that pressure switch/sensor wasn't changed and that my system didn't need a power flush. So I'm not really sure what to believe.
I still have the error, so I was thinking about just getting the pressure switch/sensor changed again, but I just wanted to find out if the was anything I could do to determine the cause of the issue?
Also, I was thinking about calling out a vaillant engineer, I know it might cost more but I would just like this issue fixed. Would this be a sensible approach? Or if any one could suggest a good gas engineer who covers Rickmansworth, herts, that would be good too.
Btw - I have asked BG to double check their engineers advice, and they are carrying out an investigation. But this all takes time and I have young kids so would like this issue resolved quickly.
Any help would be greatly appreciated
I do have British gas home care, I have had three engineers around and the last guy changed the pressure switch/sensor but then told me that I would need an external expansion vessel and BG power flush before they would come out again. The work would cost approx £1000. I advised them that I already had the system flushed 6 months ago, but the BG engineers claimed it had not been done correctly.
Anyway, I decided to get the expansion vessel fitted, as I do have 15 radiators in my house and reading info on this on the web it seemed sensible. I used an independent gas engineer to fit 25l vessel. He told me that pressure switch/sensor wasn't changed and that my system didn't need a power flush. So I'm not really sure what to believe.
I still have the error, so I was thinking about just getting the pressure switch/sensor changed again, but I just wanted to find out if the was anything I could do to determine the cause of the issue?
Also, I was thinking about calling out a vaillant engineer, I know it might cost more but I would just like this issue fixed. Would this be a sensible approach? Or if any one could suggest a good gas engineer who covers Rickmansworth, herts, that would be good too.
Btw - I have asked BG to double check their engineers advice, and they are carrying out an investigation. But this all takes time and I have young kids so would like this issue resolved quickly.
Any help would be greatly appreciated