Hello, I was driving back from a three week stay in florida to my home in Minnesota and flipped on the heater around Iowa. It worked very well before heading down there, but not so much now. There is heated air coming from the passenger side blower, but just recirculated air from the driver side vents. Neither seem to be that strong, or blow with much force.. I was low on coolant, and was wondering if something may have arisen from that. THis is true for the defrost, and floor vents alike. Any advice would be appreciated, thanks.btw, i drove an 83 4x4 down, with 170k, and it never skipped a beat!