I have bleed the pipe which comes from the heater matrix, all I get is water.

It also offered some "luxuries" as standard, such as an internal heater matrix.

The operating control is actually opening the water valve and allowing hot water to enter the heater matrix.

He also claimed to have become a mechanic overnight due to this encounter, but did not know what a heater matrix was when asked by Mick!

Before embarking on the time consuming (and expensive) operation of renewing the heater matrix let's look at a more obvious and simpler point.

Heater Matrix leaking, heater Fan not working, Over-rider misshaped.

Heater Matrix A common problem with heater matrix is that it will start to leak on average around 100k.

Dave's Response:- The engine temperature will affect the temperature of the heater matrix and therefore the amount of heat getting through to the interior of the car.

The heater is not good enough to pump the coolant round without help and Maserati suggested a modification which involved fitting an electric water pump in the plumbing going to the heater matrix.

The heater matrix on the SIII commonly blocks up if it is used with hard water so it may need cleaning out by a radiator specialist or replacing as flushing with cleaning chemicals is not very effective.