My 2007 is blowing cold air out when the heater is on

What is your question?

It just started doing this some days the heater will work. It seems like it will put out heat when I'm on the highway but lately no heat at all

What makes this problem better or worse?

The heater never blows warm air when I warm it up before driving

How long has your 2007 Toyota RAV4 had this problem?

2 werks