heater not blowing hot air on 1990 Ford Probe

The heater blows out cold air instead of hot air. I've changed the thermostat. My car also overheats. What could it be?

by in Sumter, SC on January 05, 2010
1 answer
ANSWER by on January 06, 2010
You may have a bad water pump, but get this looked at by a mechanic that can diagnose this and determine if any damage has been done to the engine from the overheating.