Piaggio Porter 1.3 16V Water Sensor/ Thermoswitch Control

Hello all Piaggio Porter lovers, in this article we will show you how to disassemble the radiator thermoswitch and how to check if it works perfectly.

1. First, disconnect the negative (-) battery terminal.
2. Drain all the coolant.
3. Unplug the connector from the thermoswitch
   radiator.
4. Remove the radiator thermoswitch from the radiator hose.

After you have removed the thermoswitch from the radiator hose you don't know how to check if it works or not? Don't worry, we thought about this too. Here's how:

1. Connect an ohmmeter between terminals A and B of the
   radiator thermoswitch.
2. Put the heat sensing section
   of the switch in a water bath. (As in the image opposite).
3. Heat the water up to the temperature of 93°C. Check for attendance
   continuity between terminals A - B of the thermal switch
   of the radiator. If there is no continuity, run
   
   the following controls.
4. Bring the water temperature to 97°C. Check
   the presence of continuity between terminals A and
   B of the switch. If there is no continuity, replace
   the switch.
5. Bring the water temperature to 94°C. Check
   the lack of continuity between terminals A - B
   of the switch. If there is continuity,
   perform the following checks.
6. Bring the water temperature to 85°C. Check
   the lack of continuity between the A - B terminals of the circuit-breaker.
   If there is continuity,
   replace the switch.

After making sure that your switch works perfectly, reassemble the thermoswitch. Here's how:

1. Clean the threaded portion of the switch, after which we recommend wrapping the thread with tape.
2. Once this is done, mount the radiator thermoswitch on the radiator hose.
3. Fill up with coolant.
4. Connect the negative (-) battery terminal.
5. Start the engine and check for leaks
   of water.