New to Forum, not to the yaris or cars

[Leegamer]

We have had some really cold days for Virginia here lately and I've noticed a few funky things:

1. My heater core seems to be squeaking like a mouse before it gets warm
2. The locking mechanism on my hatch has been freezing up a lot lately.

I suppose I may need to replace both of these before next winter just to be safe. The squeak is really annoying.