The PCB is one of the
most important parts of a system that allows all the electronic components in
your boiler to interconnect in order to allow your boiler to work efficiently.
Before the boiler ignites it sends a signal for the fan to start. It ensures
the air pressure change from the air pressure switch to check on the running
fan, before it begins to ignite. This is done because the fan is a component
that takes harmful gases from your boiler via the flue. During the process, the
gas valve opens and supplies enough gas to the burner, which then gets ignited
using a spark generator.
How does a boiler PCB works?
The PCB is built to
constantly monitor a range of sensors and gauges in order to ensure that the
boiler is always able to operate within tolerance in terms of both temperature
and pressure. As soon as any oddity gets noticed by the PCB, it automatically
locks out and displays a fault code.
Almost all the boilers
are made to use a generic PCB unit that doesn’t work with a boiler without the
correct boiler chip card that’s in good condition and has been properly
What can cause PCB problems?
There are probably two
problems that your boiler engineer needs to look out for.
vibrations- If in case you witness your boiler being noisier than usual, then this
is not as common as it looks like. However there is a much bigger issue that
needs to be considered soon. Most of the boiler components come being extremely
fragile which is why excessive vibrations can cause things such as the boiler
chip cards and connections to the PCB to break loose or even damage the wiring.
Before fixing the PCB, you must let your boiler engineer to check all the
components that either individually or together strives to contribute to these
- Water damage- another
reason of your boiler to breakdown is the water damage that is caused by any
kind of leaks in either the heat exchanger or the pump. The heat exchanger
could easily breakdown in case of a lime scale build-up that creates hot spots
and thus weakens the sections of the heat exchanger. For this you need to
ensure that your system is free from any sludge and gets dosed with inhibitor.
You might be wondering
as to how much you would need to spend from your pocket in order to fit a new
PCB in your system.
How much will it cost to fit a new PCB in my boiler?
To be true, PCB is one of
the most important and expensive component in your boiler. The repair cost for
the same could hang between £400-500 whereas getting a new PCB could cost
between £1,800-2000. However, the cost could vary depending upon the model you
As now you have a clear idea of
what a boiler PCB is and how much would it cost, you might be wondering about
how long does it takes to replace a boiler PCB.
How long does it take to replace a boiler PCB?
If in case your boiler
has any issues with the PCB, a repair could easily be done within one working
day and that is probably the maximum time it would take for the same.