typical Audi problem. The water pump is stuffed. Impeller is free wheeling on its spindle. $$$
Could be low on coolant.
actuator could be defaulted, causing the blend doors not open from heat to cold.
heat sheilds
it could be the blower switch
how do i diagnose a heat problem in a 1999 audi quatro
Check the coolant level. Or, thermostat could be stuck in open position.
Your body heat.
sulfur reacts violently with heat causing flames
Brimstone - 1998 Heat 1-2 was released on: USA: 30 October 1998
Heat from the Sun.
Heat exhaustion.
heat exhaustion.