normally the matrix is in centre of the heater unit,but check that the floors are damp/wet in the foot wells as it's a lot of work (big job) to find out it's not leaking
best of luck
steray
December 2008
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.