Is your coolant level dropping? If so it could be a leaky heater matrix
fff
April 2012
look at master cyl plate for brake as when you press hard on pedal they open up on the sealing bead.you can see it best from under bonnet with bottle for washers out
bob
April 2012
I can answer this question...
how do i trace a water leak in the drivers side footwell in my Vauxhall Cor?