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  #1  
Old 22nd June 2012, 10:13 PM
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mgglep mgglep is offline
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Default Thermostat

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
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Old 22nd June 2012, 11:04 PM
michael92 michael92 is offline
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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
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Old 24th June 2012, 12:23 PM
flyerncle flyerncle is offline
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Thermostatic swith to control cooling fan not engine thermostat.

Make it switchable or it will run all the time if the switch goes faulty.
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Old 24th June 2012, 06:49 PM
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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.
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