How can I fix heating system on my ford fiesta?

It sounds like your heater core has sprung a leak, either in the core itself or in the heater hose connected to it. The core is located under the dashboard usually on the passenger side. In the engine compartment, follow the two heater hoses to where they dissapear into the firewall and directly on the other side is the core. Its easy to replace but messy. Have a wet/dry vac handy.

Dale
December 2005