Pinpoint Test I : Insufficient, Erratic Or No Heat: Notes
WARNING: This page is about a different car, the 2016 Ford Transit Connect. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation and Fault Conditions
Warm coolant flows from the engine through the heater core and back to the engine. Proper coolant temperatures are critical for good heater performance.
Possible Sources
Possible Sources
- Low engine coolant level
- Plugged or partially plugged heater core
- Temperature door binding or stuck
- Temperature door actuator