heater problem - need some help!
 

Hey all,

I have a 98 A4 2.8L V6. I've been having problems with what we thought was the thermostat... during hot weather, the A/C works but at times the outside temperature read would fall and my A/C would not work until it was back up. Now that it's getting colder, my heater does not blow hot even though the water pump is warm and normal temperature. Any ideas?

plugged heater core?