Hello and good evening, I now have another Escort GAL 1.6 L, 90 HP, year 1993 (by the way my fifth Ford in seventeen years) and have a question. Today I wanted to have it a bit warm in the car and had to find out that it was nothing. It came only lukewarm, rather cold air. The hose to the heat exchanger of the heater was hot, the other of the heat exchanger was almost cold. I assume that the heat exchanger is too. Fortunately I have another one. Now my questions : How do I exchange this thing? Is it from the outside or do I have to disassemble the dashboard? How difficult is the thing and how is the workflow? Can someone give me a few tips? Thank you very much in advance, because I know from experience (with my previous cars I have always found answers here), that there are many competent experts present in this forum.