Have an 06 Impala 3.9L IP and I can't get the heater to blow hot. I just replaced my AC compressor clutch because my AC wasn't working. Now it seems the heater doesn't want to work. There'* no leaks, radiator fans engage, not low on coolant, thermostat does function, and the waterpump was replaced only a year ago.
When I use to switch from cold to hot or hot to cold, it use to stop what was blowing, and than restart with the cold or hot. Now when I switch from hot to cold or opposite, nothing happens. Is there an actuator that is responsible for switching the temperature controls..??
Help would be appreciated!