Vaillant Group is one of the leading and a reputed brand in the boilers global
market. The company is dedicated to provide true, long-lasting and comfort to
all the homes across the UK. That’s why there boiler comes with 10 years
guarantee, becoming the most reliable boilers in the market.
in some of the Vaillant boiler there is f75 code which appears on the display
of the boilers. You might be thinking what does f75 mean on a vaillant boiler?
Here is the answer to your question
The Vaillant f75 error is a common fault code on
Vaillant ecoTEC boilers. Vaillant ecoTEC is one of the most leading ranges of
boilers. The early models were fitted with a pump and a pressure sensor was not
so reliable. In the same period, 2000-2010 EcoTEC models were launched and often
experienced f75 fault code.
However, before the Vaillant Company was getting
there pumps manufactured from a company called Wilo. Those pumps are now having
a high failure rate. And they are likely to cause leakage and spillage. But
now, the Vaillant is using the pumps manufactured from Grundfos Company, which
are far better than that of Wilo Company.
is the f75 fault code?
To the answer of your question what does f75 mean on
a vaillant boiler? We have some details which will make you understand about
According to the Vaillant Installation and Service
Book, the f75 fault code signifies ‘Fault, no pressure change detection when
the f75 fault code is caused?
The Vaillant f75 fault code is caused mainly by two
clogged pressure sensor
The fault is either because the pump of the boiler
is not working properly or the pressure sensor is congested in debris and
unable to find any kind of change in pressure even after the pump is working
to detect f75 default in the boiler?
After getting to know about what does f75 mean on a
vaillant boiler? You might be thinking how you will get to know that the boiler
has been affected by the f75 default.
Not to worry it following these steps will let you
know about the fault code.
by checking the pump
The easiest ad quick way to diagnose the f75 fault
code in the boiler is to check the pump. For this you need to follow some
you need to reset your boiler. This can be done by switching the lockout button
which is signified with a flame symbol.
wait for few minutes and start to run the hot water tap. This will fire the
soon as the boiler begins to fire, the heating pump will knock in and will
supply the water to the hot water tap.
the pump is not in a working condition , you won’t hear any sound nor will feel
anything. If this happens with your boiler, you need to call a gas safe
engineer who will install the replacement pump for you. Hence you will get to
know the fault f75 has been caused because of the faulty pump of your boiler.
if the pump is working you will get to hear a humming sound and the boiler will
start to vibrate softly. The pump will begin and makes sound for about 20
seconds and afterwards gets silent, then resound again. If you can hear the
sound of the pump, this will ensure you that your pump is working properly and
the fault is due to the pressure sensor.
to fix the Vaillant f75 fault?
If the fault is caused due to the
pressure sensor than it can be healed by stripping it out and cleaning the
water block where it is fitted before installing the new one. You need to
remember this, that the pressure sensors are comparatively inexpensive. So try
to replace them instead of making them clean and refitted again.
The sludge is said to be the major
cause for the f75 fault code. You should make sure that the system is free from
any contaminants. Also make sure that the inhibitor level are topped up to the
correct and right level, this will minimize the emergence of the sludge. One
more way to prevent the sludge from reaching the boiler and its components is
to install magnetic or dirt filters involved in it.