Added five litres of coolant today(yikes)to the full cold top line on the reservoir and heat is back 100% so I'll keep an eye on it now.Sent from my Yamaha Grizzly 700 EPS somewhere in the Great White North.

Not sure what generation truck my 2012 F-150 5.0L 4x4 crew cab is so if I'm in the wrong place for this question my apologies.So The wife is telling me that when she's driving the truck she gets good heat but as soon as she stops at a light the heat goes cold and comes back when she starts to...