Toyota Repair: 1995 4 runner 4 wheel drive six cllinder heater blows cold, radiator shop, control cables

Question
Ted,  my heater is blowing cold air the  a/c works fine. The problem started last year, I believe gradually.  We replaced  the radiator but not the heat core. Any ideas.  It has 175,000 miles.

Answer
Check to make sure the control cables work,check the heater valve for operation, check to make sure all control cables under the dash are connected, if all that checks good then the heater core should be removedand either cleaned out at a radiator shop or replaced.