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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 12-15-2009, 05:54 PM   #1 (permalink)
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Hot Air By Legs While Running Ac

Does anyone know what causes hot air to come out from underneath dashboard while rest of the car is blowing cold air.

I have my AC set on AUTO at 60 degrees and it feels like a furnace at leg level, but it blows real cold from the dashboard and door vents. If I were to switch from AUTO to just legs while running my AC it blows nothing but hot air.

Could this be part of the reason why I keep losing coolant without noticing any leaks whatsover. I have to top off the coolant every other day...or every 100 miles or so with at least half gallon of 50/50 antifreeze. There is no visible smoke or coolant smell inside or outside of the car. There is no oil in coolant or vice versa.

THANK YOU GUYS FOR YOUR FEEDBACK!!
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Old 12-15-2009, 05:59 PM   #2 (permalink)
OMFG another one!?
 
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There might be a leak from or near the heater core. The heater core valve is likely stuck, keeping the core hot. Also maybe a dash flap that directs air to the heater core is stuck.
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