Thermostat

[mgglep]

Hi all I am using a polo rad with the large screw in bolt type thermostat it has 3 terminals on the back does anyone know what they need to be wired to also shall I switch the live or earth shall I get the feed from the battery or from another source any help would be appreciated wiring was never my strong point

[michael92]

i cant %100 tell you what to do but one wire will be a live one will be a ground and the other remaining will be a sensor wire which tells your ecu/switch control the resistance(temperature)

hope that maybe clears something up

mike

[flyerncle]

Thermostatic swith to control cooling fan not engine thermostat.

Make it switchable or it will run all the time if the switch goes faulty.

[alga]

The three terminal one is for a 2-speed fan. I suspect it might not be ideal for a 1-speed fan application, as the trigger temperatures may be lower and higher than ideal for a single switch. I just bought a 2-terminal one. Mine is there mostly to plug the hole in the radiator, the ECU will control the radiator fan based on the temp sensor in the thermostat housing.