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  #1  
Old 10-11-2019, 11:01 PM
Barristerwa Barristerwa is offline
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Heater always on

So, I recently noticed that my BMW after 30+ minutes of driving the heat, no matter if I have the temperature set to its lowest (60), is letting warm air into the cabin. I have to turn the AC on to cool it down even though its a comfortable 56 degrees F.

Anyone know why this might be the case?

Im thinking about replacing the cabin Microfilter. Im getting a bad smell when I run the AC and perhaps its also contributing to the warm air.

Thx for any help you can offer.
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  #2  
Old 10-12-2019, 04:21 AM
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Doug Huffman Doug Huffman is offline
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Your BMW IHKA HVAC must always be on to function as intended and AUTO is the default.
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Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
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Old 10-12-2019, 05:38 AM
John MS John MS is offline
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If you turn the system off does warm air continue to come in as you drive?
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Old 10-12-2019, 06:07 AM
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Doug Huffman Doug Huffman is offline
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Location: Washington Island, Wisconsin, thru Death's Door
 
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Almost fifty years ago I did an IBEW 4-year apprenticeship, and learned a valuable lesson from a foreman that I did not respect or like. Once I learned the delay between documenting a deficiency and its engineering resolution, I just went directly to the responsible engineering code and they provided the authorized resolution. The foreman instructed me that "a system cannot function properly if it is not allowed to function."

That applies to mechanical systems as well as bureaucratic systems.

The deeper history was that Hyman G. Rickover came to the facility where I worked, years before I was there, and saw a sign in six feet high block letters on the side of a building - ZERO DEFECTS - and his temper exploded. "No human endeavor has zero defects." He started firing at the top GM-18 and all the way down to senior WG. He directed the development of the bureaucratic system above to rapidly identify defects and provide engineered correction. Correction at the management level and at the engineering level.
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Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
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  #5  
Old 10-12-2019, 04:44 PM
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tex2670 tex2670 is offline
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Quote:
Originally Posted by Barristerwa View Post
So, I recently noticed that my BMW after 30+ minutes of driving the heat, no matter if I have the temperature set to it's lowest (60), is letting warm air into the cabin. I have to turn the AC on to cool it down even though it's a comfortable 56 degrees F.

Anyone know why this might be the case?

I'm thinking about replacing the cabin Microfilter. I'm getting a bad smell when I run the AC and perhaps it's also contributing to the warm air.

Thx for any help you can offer.
Did you try turning the wheel in the middle of the dash below the vents from the red side to either the middle or the blue side?
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Old 10-12-2019, 06:18 PM
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quackbury quackbury is offline
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I'm willing to bet you caused the musty gym sock odor by turning off the A/C, am I right?

The ENTIRE system is designed to operate 365 days per year. That includes the A/C function. Even in January in Minnesota when it is -20F outside.

This topic has been discussed on this, and every other BMW model board ad nauseum. Search is your friend.
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  #7  
Old 10-13-2019, 02:07 PM
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tex2670 tex2670 is offline
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Quote:
Originally Posted by quackbury View Post
I'm willing to bet you caused the musty gym sock odor by turning off the A/C, am I right?

The ENTIRE system is designed to operate 365 days per year. That includes the A/C function. Even in January in Minnesota when it is -20F outside.

This topic has been discussed on this, and every other BMW model board ad nauseum. Search is your friend.
It has been. And then BMW updated the software so that when you turn it off, it actually stays OFF when the car is restarted. Why would BMW do this is it's so horrible?
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  #8  
Old 10-13-2019, 04:05 PM
Barristerwa Barristerwa is offline
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Quote:
Originally Posted by Doug Huffman View Post
Your BMW IHKA HVAC must always be on to function as intended and AUTO is the default.
Thanks Doug. I appreciate your response.
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  #9  
Old 10-13-2019, 04:08 PM
Barristerwa Barristerwa is offline
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Quote:
Originally Posted by quackbury View Post
I'm willing to bet you caused the musty gym sock odor by turning off the A/C, am I right?

The ENTIRE system is designed to operate 365 days per year. That includes the A/C function. Even in January in Minnesota when it is -20F outside.

This topic has been discussed on this, and every other BMW model board ad nauseum. Search is your friend.
Your suggestion and insight are well received. I did a search first to avoid the standard and well worn reply of doing that and came up empty. I'll try to search better next time. ***x1f609;
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