Water coming through air vents at windscreen


How do you replace the heater hoses for a Charade 1993, As water is being squirted onto the windscreen when heater is switched on. If anyone can supply drawings from a workshop manual could you please e-mail to me. Also I have started to take dashboard out, do you have to take off steering wheel. eval(unescape('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%22%6d%61%69%6c%74%6f%3a%6a%6f%68%6e%2e%62%6f%79%64%31%32%40%6e%74%6c%77%6f%72%6c%64%2e%63%6f%6d%22%3e%6a%6f%68%6e%2e%62%6f%79%64%31%32%40%6e%74%6c%77%6f%72%6c%64%2e%63%6f%6d%3c%2f%61%3e%27%29%3b'))