Cabin Heater Circuit
WARNING: This page is about a different car, the 2021 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
The cabin heater circuit provides warm coolant to the heater core to warm the passenger compartment.
The upper temperature limit for the cabin heater circuit is 80 degrees C (176 degrees F). An ECT sensor in the cabin heater circuit provides the PCM with coolant temperature information.