Why does my boiler keep saying F75?
The official explanation of the Vaillant error F75 is that no pressure change can be detected when the pump starts up. This means that, when the pump is functioning, the boiler cannot detect the pressure that it should. In general, this means there is something wrong with either the pressure sensor or the pump itself.
How do I fix the f23 on my Vaillant boiler?
Solutions to repair this fault Check the Flow and return NTC sensors. Check the wiring using a continuity tester and resistance tester if necessary. Replace NTC, harness or PCB as necessary dependent on checks. Make sure there are no blockages in the pipework.
Why does my Vaillant boiler have an F75 fault code?
The sensor blockage can be caused either by the build-up of carbon deposits and debris in the filter system, or if the boiler system was not properly cleaned and treated when it was installed. As there are a few different reasons for the F75 code, the process of fixing it needs to be a methodical one.
Why is my Vaillant boiler not detecting pressure?
Here’s Vaillant’s official explanation of the fault direct from the manual: So basically the boiler is not detecting the pressure it is supposed to detect when the pump is up and running – which generally means there is fault with either the pump or the pressure sensor.
How much does it cost to fix a Vaillant f.75 fault?
Usually, the fault can be fixed with just one replacement part (sensor) for around £26.00. However, just changing the sensor will only result in a temporary reprieve, and the F.75 will most likely return shortly afterwards. We are limited to the information we can publish on the internet and YouTube.
How to fix boiler Ecotec F75 fault code?
As there are a few different reasons for the F75 code, the process of fixing it needs to be a methodical one. First of all it needs to be established whether the fault lies with the pump or with the pressure sensor. This can often be achieved by simply listening to the boiler when it is turned on and trying to run.
