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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 12-10-2009, 10:07 PM   #1 (permalink)
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heater problem?

hi guys im new to this forum.. just bought my bimmer last week and im having a problem with my heater.
. the temperature gauge in the gauges is at normal(dead straight in the middle), so we can rule out thermostat??
but the air blows hot sometimes and smetimes cold then hot again and the cold..etc etc... ive tried setting it at auto,, max temperature... ive also turned the knob in the middle of the vents to red.. still nothing..

if anyone have some idea please let me know because its cold here in canada!!
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Old 12-10-2009, 10:08 PM   #2 (permalink)
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its a 99 323i e46 if it matters.....
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Old 12-10-2009, 10:36 PM   #3 (permalink)
OMFG another one!?
 
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Could be the heater core has packed up.
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Old 12-11-2009, 08:23 AM   #4 (permalink)
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You can't rely on the temp guage. That being said, first I would park the car on an incline with the rear of the car lower than the front. Take the cap off the radiator and while the car is running and the heater on full blast, start pouring 50/50 bmw coolant and distilled water into the radiator a little at a time. I suspect you have air in the system. My e39 does this and it takes forever to produce heat. Get the air out and you will be golden. By raising the front end, the air rises in the system and works itelf out. Good luck.
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