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HVAC (cooloing) fan control by FieroTony
Started on: 01-15-2014 10:01 AM
Replies: 3 (65 views)
Last post by: donuteater306 on 01-17-2014 01:46 AM
FieroTony
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Report this Post01-15-2014 10:01 AM Click Here to See the Profile for FieroTonyClick Here to Email FieroTonySend a Private Message to FieroTonyEdit/Delete MessageReply w/QuoteDirect Link to This Post
88 2M4 w/AC

I just replaced my HVAC control unit. Was working fine but 2 of the button [covers] popped off, lost one.

When you turn the A/C on, the cooling fan comes on which is normal. When you turn on the defrosters, the A/C compressor kicks on which again is also normal. I can't remember if the cooling fan is supposed to come on as well during this [defrost] cycle. Reason asking, because mine doesn't.
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Report this Post01-15-2014 10:35 AM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
defog=ac-on,rad fan-off
Too cold... Low pressure limit switch cuts power to AC

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FieroTony
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Report this Post01-15-2014 10:49 AM Click Here to See the Profile for FieroTonyClick Here to Email FieroTonySend a Private Message to FieroTonyEdit/Delete MessageReply w/QuoteDirect Link to This Post
Sorry, I tend to get too wordy or try to over explain.

Turn defrosters on, A/C compressor kicks on, defrosters work. Question was: Is the [radiator] cooling fan supposed to come on in the defroster mode?

Thanx again
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donuteater306
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Report this Post01-17-2014 01:46 AM Click Here to See the Profile for donuteater306Click Here to Email donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
No sir. The radiator fan is NOT suppose to turn on in defrost mode. Only Max, Norm, and Bi-level should turn on the radiator fan.
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