YES, the Raspberry Pi 4 can definitely run hot.

The Pimoroni Fan Shim is a no-solder, plug-and-go solution that is CPU controllable with an RGB LED (and why not?) and programmable button.

As this module is CPU controllable, you can program the functionality of the button, RGB LED and fan. Use the RGB to illustrate CPU load. Set the button up for an emergency-shutdown (or FULL SPEED AHEAD fan mode) – it’s up to you.

Specifications:

• 30mm 5VDC fan
  • 4200 RPM
  • 0.05m³/minute air flow
  • 18.6 dB (super-quiet)
• Friction-fit header
• No Soldering required
• Programmable APA102 RGB LED
• Programmable-function tactile switch
• Raspberry Pi 4/3B+, 3A+ compatible
• Python library & daemon support

Note

• As this shim uses the BCM18 pin, you lose access to using I²S audio devices with this add-on.
• NOT heat-sink compatible