This is topic Why does the AC turn on when... in forum Tech Talk at Northern California Ford Owners  .


To visit this topic, use this URL:
https://californiafords.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=6;t=005286

---

Posted by AcesWild85 (Member # 2616) on :
 
I don' t know how long it has been like this, but the AC turns on whenever I've got 'defrost' or 'mix' (and obviously normal and max AC) selected. Is something not wired correctly or what? I noticed this a few weeks ago when i had the defrost on full hot and well it just wasn't that warm. I happened to look under the hood afterward and there was condensation all over the AC compressor and attached hoses. Any ideas?
 

---

Posted by ON N2O (Member # 2067) on :
 
it has something to do with the ac system using a dehumidifier or something.... air that has no water/moisture in it defrost your windshield better than air that has water/humidity in it. i think dehumidifier is the wrong word i think it is the evaporator...
 

---

Posted by Chico Stang (Member # 801) on :
 
Yea onn20 is correct. When the defrost is on, it circulates air through the ac to get rid of your moisture. They do this so that in the morning your windshield will clear up faster. It is supposed to be like that.
 

---

Posted by ON N2O (Member # 2067) on :
 
thanks Chico Stang
 

---

Posted by AcesWild85 (Member # 2616) on :
 
What about when I've got 'Mix' selected? Isn't mix supposed to channel the air throught he floor vent and the dash vents and not activate the AC?
 

---

Posted by ON N2O (Member # 2067) on :
 

quote:

---

Originally posted by AcesWild85:
What about when I've got 'Mix' selected? Isn't mix supposed to channel the air throught he floor vent and the dash vents and not activate the AC?

---

no the mix is supposed to be mix between floor and defrost position i beileve, and anytime the defrost is chosen, the ac goes on
 

---

Posted by AcesWild85 (Member # 2616) on :
 
oh....ok. Nevermind then
 

---