Piaggio 293301 Radiator Thermal Switch 88/81 – Hexagon and Gilera Runner 125-200

The Piaggio 293301 radiator thermal switch is the original sensor that controls the radiator's electric fan on liquid-cooled Piaggio group scooters from the late nineties: Piaggio Hexagon (125, 150, GT, GTX, LX, LXT, Super Hexagon GTX) and Gilera Runner 125, 180 and 200 of the first generation. Hexagonal brass body with thread, two faston terminals, calibration 88/81 °C. Product code 293301.

✓ Strengths

• Original Piaggio spare part – this is code 293301 as listed in the radiator group catalog for Hexagon and Runner, not a universal sensor to be adapted.
• Original equipment calibration – it closes the contact at 88 °C and reopens it at 81 °C: the fan starts when needed and stops without oscillating.
• Brass body – hex for the wrench, clean thread, black insulating cap: resistant to coolant and vibrations.
• Two faston terminals – they connect directly to the original system's connectors, without modifying the wiring.
• Quick replacement – it screws in place of the old sensor on the radiator, with the system cold and the fluid level to be restored.

Technical specifications

Vehicle compatibility

The list is based on the official Piaggio spare parts catalog (B2B area). If you have a doubt about the year or version, send us the chassis number and we will verify the correct code for you.

Who it's perfect for

It is the spare part for those who own a first-generation Hexagon or Runner and see the temperature rise in traffic without the fan turning on, or hear the fan running continuously even when the engine is cold: in both cases, the thermal switch is the prime suspect, and replacing it with an original one brings the system back to the thresholds set by Piaggio. It is useful for workshops that overhaul the cooling of these scooters, for those preparing their vehicle before summer, and for anyone who wants to prevent an uncertain contact costing a few euros from risking the cylinder head gasket and engine.

Frequently asked questions

On which scooters can the Piaggio 293301 thermal switch be mounted?
Code 293301 is listed in the Piaggio spare parts catalog in the radiator group for Piaggio Hexagon 125, 150, GT, GTX 125 and 180, LX, LXT, Super Hexagon GTX 125 and 180, Hexagon GT 250 and Super Exagon GTX, and for Gilera Runner 125 FX and VX, 180 FXR and VXR and 200 VXR up to 2004, as in the table.

What is its purpose and how do I know it's faulty?
It's a thermal switch screwed onto the radiator: when the liquid reaches 88 °C, it closes the contact and starts the electric fan; at 81 °C, it reopens it. If the temperature rises in traffic without the fan starting, or if the fan runs continuously, the sensor needs to be replaced; however, it's advisable to check the fuse and connectors first.

Is it the same sensor that operates the temperature gauge?
No. The dashboard indicator is powered by a separate sensor, with a different code, and the fluid flow is regulated by the thermostat. The 293301 only controls the electric fan. If the needle doesn't move or the warning light stays on, this is not the part to check: contact us and we'll tell you the correct code.

How is it replaced?
With the engine cold, disconnect the two faston terminals, unscrew the sensor from the radiator using a wrench on the hex, and screw in the new one with its seal, without forcing. A small amount of liquid will escape and needs to be topped up; then, warm the engine at idle and verify that the fan starts and stops by itself. No adjustment is necessary.

Is it an original Piaggio spare part or an aftermarket equivalent?
It is the original Piaggio spare part with code 293301, new and never mounted, the same one provided by the manufacturer for these scooters. It is not a universal thermal switch with generic thresholds: calibration, thread, and terminals are those of the original equipment for Hexagon and Runner. It is shipped from Italy with an invoice.

Is it also suitable for newer Runners and Hexagons or for Beverly and X9?
The Piaggio catalog associates the 293301 with the Hexagon and Runner generations listed in the table. For Runners from 2005 onwards and for other models in the group, the manufacturer provides its own codes, even when the sensor appears identical. If your scooter is not listed, send us the chassis number and we will verify before purchase.