Did I see in the news that you guys up north just got a summer snow storm?!!

You might want to check the air flow through the heater core and compare it to fresh air flow.
I park under a tree and I get leaves that fall through the cab fresh air intake and fall onto the heater core.
They pile up and block some of the air flow and the only way I've found to fix it is to remove the heater core/fan/box
and clean it out. I've done this twice now and I need to do it again before winter. It get so bad that the defroster works but not very well.
If you want to get the heat into the cold cab you'll want to look at this and compare air flow to fresh air. Not inside / outside air but defrost/heat/air.
Both heat and defrost flow through the heater core. Another tip is be very careful removing the heater hoses from the heater core. The metal is very thin and bends easily.
I have one that I had to disconnect from under the hood and pull it through the firewall - not as hard as it might sound.

Anyway, I get cold just thinking about living up there in all that snow...


P1010010.jpg