1998 Audi A4 "heater blows hot" Questions

blows hot for 15-20 seconds then cools down. I can turn off the system and wait 10 minutes and it will blow hot air again but cools down 15-20 seconds later. Both Heater Core hoses are hot. You likely

heter blows cold air when engine is hot heater blows cold air when engine is hot The thermostat is faulty. Change the thermostat.

heater blowing cold when set at hot Hi, your engine sound run at 90 degrees when hot, if you change the themastate in the engine block sould cure the problem, if not bleed the heater matrix from the ...

...heater hoses are hot into the car,,either the blend dorr they call it thats what changes from cold to hot,the flap as you say,or the heater controller that controls it is bad..The dial on the dash ...

...heater only blows hot air even if i change the setting to "Lo". When the heater is set to "off", hot air stills comes through and increases the faster the car is going once the engine is warm. I ...

...heater core. If only 1 is hot you do have some blockage, if both are hot then it is circulating properly and your problem lies somewhere else. Dual zone systems also have a split door between the ...

...the coolant level dopped so i topped it up and the heaters wouldnt work for the rest of the day. the next day they worked but since then no air hot or cold blows from the vents. is the fan working

...heater only blows cold air we have had a new heater matrix a new water pump and thermostat and a new radiator now it blow luke warm air but not hot,please any ideas sounds like the thermostat is not ...

...heater in my car is on hot but blowing out cold air wot could be problem I am not an Audi expert, but it sounds like your heater water control valve made be inoperative. Also could be low on water... ...

...heater core but curious to know if the climate control would also prevent the temperture to change to blow out hot or cold air. it looks as though my climate control may be going out and only reaches ...