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mspdfreak
12-14-2004, 10:32 PM
Is our A/C compressor supposed to be on while the heater is running? The vent is turned to "floor only", and the A/C button is turned off. WTF?
Black Majik MSP
12-14-2004, 11:01 PM
I have no A/C & my heater still works.
garretts77
12-14-2004, 11:03 PM
I think that I read someplace that it comes on when in the floor only and defrost postions. I have noticed my compressor coming on in the floor only position as well, so I just don't use it. There is a how-to thread on how to disable the auto AC.
BlkZoomZoom
12-14-2004, 11:05 PM
It is done for a purpose. Leave it alone. All cars cycle the a/c in those positions to run it through the evaporator so it gets the humidity out. That way it doesn't fog your windshield or promote dampness of the carpet. Again, leave it alone, unless your KraZy like Black majic. lol
garretts77
12-14-2004, 11:07 PM
Yeah, I mostly don't feel like doing some crazy crap to my electricals, so I left mine alone. I use the bi-level and it works as expected.
msp35
12-14-2004, 11:07 PM
Yes, thank you mazda. :mad:

Wait anything past split vent/floor will turn the compressor on.
BlkZoomZoom
12-14-2004, 11:13 PM
All cars do it. Not just Mazda. Thanks ALL car Manu.
mspdfreak
12-14-2004, 11:34 PM
Oh, I don't mind, I've just never noticed it before. I just wanted to make sure I wasn't crazy!(cool)
Redlyne_Speed
12-15-2004, 12:39 AM
Yep my Celica did same thing, and always wondered why, now I know cool thanks.
Dr.Sound
12-15-2004, 01:05 AM
there is a how-to to get rid of it.
requires soldering and taking half of your dashboard out.
mspdfreak
12-15-2004, 03:33 PM
No, then if my rear fascia falls off, the dealer will say it's because I disabled the compressor!:rolleyes:
Demonic-Speed
12-15-2004, 06:00 PM
I followed the How to, but now I don't AC and my parking lights don't work...Do you think I did something wrong?
Dr.Sound
12-15-2004, 06:12 PM
^ lmao

.....wait, r u for real??
Stormtrooper77
12-15-2004, 06:14 PM
The "How-To" is actually very easy. It takes about half an hour if you are mechanically inclined and have taken a dash apart before. It doesn't require any soldering, just scraping.

It's so annoying having the compressor come on in the winter when you actually don't need it. The heated air will be hot enough to clear your windows. Plus, your gas mileage is taking a hit when this happens.

Do the "How-To", you won't regret it. Plus, you get FULL control over your HVAC system instead of Mazda dictating it.
memo79
12-15-2004, 06:17 PM
I followed the How to, but now I don't AC and my parking lights don't work...Do you think I did something wrong?

Uhm, I'm gonna have to go with "yes" on this one.