How do i fix my fiesta's heating problem?

I ran out of water in my ford fiesta and carried on driving without realising, i smelt plastic burning and this is when i realised i had a water problem. since then my car heater won't blow hot air! i have had the thermostat replaced but have had no luck.....any ideas?
Sev, November 2004


done
may be the heater valve on the n/s of car under the bonnet it goes where the hoses enter the inside of car fitted on fiestas after 89

colin bedford keys, December 2004
blockage in you water pipe

Paul Shadow, December 2004
link Click here to see other fixes for Ford Fiesta.