Over Heating in my 2nd Gen 3SGTE, Thermos only works, just after idle Options

[ST-204R]

Gday guys, just a bit of a funny problem im kinda hoping someone will tell me thatg it is a simple fix and a common problem.

But started the car to warm it up walked away came back after a few minutes to find my St185 giving the presents of a dragon, steam coming out of every crack from the from end.(lol Looked pretty sweet) turned it off staight away.. after a bit of rooting around it turns out to be the thermos not kicking it. I checked to wriirng it all looks fine. so i hard wired, for the sake of a test, and the thermos turned on.So either a relay or sensor problem. Being a 20 yr old car surely a simple probel with the electric im going to guess. I will investigate further, but i just want to know if its something someone else has come across before and hopefully put me in the right dicertion quicker.


Cheers People

(Ps i know that this is a 6gc site, i also own a 6gc but 90% OF 5gc owners wouldnt know what a forum is lol)

[ST-204R]

sorry also forgot to mention that when its all wirred up properly, on idle thermos wont kick in but anything more the idle, so 1100rpm, the thermos come on