Kolton Terry

This is my first audi and it's been having coolant issues first off if it's cold out the heat wont come out warm so I did a flush and I noticed the return hose on the heater core has no pressure and just slowly drizzles out and now it has now the coolant light comes on when driving if it's not under rpms but there plenty of coolant in the resivour

lyleswk

Likely just need to bleed the system since you opened it up. There are many links on how to bleed. The issue with your heat / core is it is clogged core. Will have to get more aggressive using CLR or something like that or just replace.