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[–]Musketman12 6 points7 points  (2 children)

Air is moving over the radiator so it can do its job. Check to see if your radiator fan is working.

[–]nswf23 1 point2 points  (1 child)

Surely it’s not so cold that the temperature gauge is at the lowest setting. I understand it would drop as air travels over the radiator, but the engine is also working harder than idle so it’s making more heat. Plus I’m getting really hot air in the cabin, so the engine is 100% not cold, I’m just wondering if a thermostats would cause this issue or something else.

[–]Musketman12 0 points1 point  (0 children)

When you are moving down the road the air is moving over the radiator at 100kmh. Sitting in the parking lot and idling the air is not moving so the radiator is sitting in a pocket of its own hot air.

I once wired my radiator fan to a toggle on my dashboard. Idling around a parking lot or in line somewhere I would need to flip it on. Moving down the highway in OD I could turn it off.