Where is the pressure sensor on a Vaillant EcoTEC Plus?
The sensor will be fitted about a foot higher than were you would expect it to be. It’s on the return pipe (back pipe) just before it enters the heat exchanger. It’s difficult to see it as it’s fitted behind the plastic air intake that attaches to the gas valve.
Why is my boiler showing F75?
An F75 error code means that there is no pressure change being detected when the pump starts. This is usually due to a problem with the pressure sensor, the pump or a leak on your heating pipework causing your boiler to lose pressure.
What does F75 mean on Vaillant boiler?
The F75 / F9 code means that when the boiler runs through its start up tests, it has failed to see a rise in the system pressure when it tries to spin the pump.
What does F75 mean on a Vaillant boiler?
Why does my boiler say F75?
What is F75 fault?
no pressure change
An F75 error code means that there is no pressure change being detected when the pump starts. In short, the boiler is failing to detect the pressure it should whenever the pump is up and running, and the water is flowing through the system.
What to do if you get a Vaillant error code F75?
The only thing you can legally do is to try the purge test program. If you still have no luck then call vaillant. The boiler is still under warranty so they will fix it for free. Try 17 for the code. F75 coupled with a ‘rumbling noise’ will be pump shot. Worn bearings on the pump indicate a boiler fitted to a system without any cleaning!
What is the fault code on a Vaillant boiler?
In the main, new Vaillant boilers are fairly reliable. However, owners of the older ecoTEC range have been known to experience a few problems with the fault code F75. But what is the Vaillant F75 error code and how do you fix it? This guide will explain everything you need to know.
Is it safe to use a Vaillant Ecotec boiler?
In my experience with the Vaillant ecotec range you should be safe to use your boiler after a reset following an F.75 fault code. However this fault code typically means that you have a potential issue with your circulation pump which may be failing. This could potentially cause your boiler to overheat at some point if that’s the case.
Is there an f.75 fault code on Ecotec?
The ecoTEC suffers with an F.75 fault code, which can frequently occur, and has no defined remedy. There are a number causes, that throws up this code, which makes it virtually impossible to diagnose immediately. Frustrating, and expensive, it’s all a bit disappointing.