Another heat problem
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AudiWorld Newcomer
Joined: Jan 2024
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Another heat problem
I have a 2006 Audi A4 2.0. I have not had heat for three years in the car but it never bothered me being I live in Florida. My gauge for the heat is reading normal. No overheating issues. I changed out the heater core, which had a bunch of sediment in it. After changing it and flushing, bleeding out the air the only time I had heat was if I had the engine rev. When the car sits at idle, the air gets cold. The hoses going into the firewall The lower or input side is hot. The output side is kind of cooler to touch. So my question is after changing out the heater core and still not having heat and I’m not having any overheat problems, What should I be looking at.? No leaks in the system as far as I can tell. No loss of coolant. Should the two lines be different temps or close to the same?
AudiWorld Senior Member
Joined: Mar 2020
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This is the B5 sub-forum so you may not get as much visibility here.
However, your issue sounds like the classic scenario of low coolant / air still in the system. It might be worth back-filling the heater core itself with some spare hose and a funnel, to ensure it's full. Then revisit the process of bleeding out any excess air.
However, your issue sounds like the classic scenario of low coolant / air still in the system. It might be worth back-filling the heater core itself with some spare hose and a funnel, to ensure it's full. Then revisit the process of bleeding out any excess air.
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