Where is the fan sending unit on a 2001 Chrysler PT Cruiser?

The fan sending unit on a 2001 Chrysler PT Cruiser isn't a single, easily identifiable component like a standalone sensor. Instead, the fan control is managed by a radiator fan control module (sometimes referred to as a fan control relay or part of the PCM – Powertrain Control Module). This module receives signals from various sensors (like coolant temperature sensor) and then activates the radiator fan(s) accordingly.

There's no single "sending unit." The relevant components are:

* Coolant Temperature Sensor (CTS): This sensor is located in the engine block and provides temperature data to the PCM. This is arguably the closest thing to a "sending unit" in this context. It's crucial for the fan's operation.

* Radiator Fan Control Module (or integrated within the PCM): This is the brain of the operation, usually located somewhere within the engine compartment near the radiator, perhaps mounted on the shroud itself or in a fuse box. It's a small electronic component.

* The Radiator Fan(s) themselves: These are driven by the control module.

To locate the relevant components, you'll likely need a repair manual specific to your 2001 Chrysler PT Cruiser. A visual inspection near the radiator and related wiring harnesses may reveal the module, while the CTS is generally easier to locate with the help of a repair manual. A faulty CTS is a common cause of fan problems.