Every once in a while in heavy traffic the engine overheats. I can’t get out to check on the highway bit I suspect a an isn’t on. I can drop the temp in the usual way of blasting the heat but I can also drop it precipitously by turning on the AC! It seems to stay down even if I turn the AC off - at least for a while.
The radiator is new and it has plenty of fluid.
Any ideas anyone?