Vehicle Questions and Answers
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If the heater in your Ford Fiesta isn't working, there could be a few potential causes. First off is the blower motor, which is responsible for circulating air throughout the vehicle. If the HVAC system is working but blowing cool air, the issue likely isn't with the blower motor. This leaves problems with either the heater core or the thermostat. The thermostat regulates where the engine coolant goes, and if it's not directing it to the heater core, there will be no heat in the vehicle. A leaking heater core indicates that it needs to be replaced due to a failed seal.
If the heater in your Ford Fiesta isn't functioning properly, the usual culprits are the blower motor, thermostat, or a faulty motor resistor.