Hi guys:
I have a 2005 Mazda 3 Hatchback and recently I have been having problems with the A/C. I'm driving with my A/C on and suddenly I will feel hot air comming through the vents, I will look at the A/C swith and the green light will be off. I will push it several times and the light will come on and the air will get cold again. I have taken my car to the dealer in 3 opportunities with no luck, they have not been able to find the problem.
Any ideas?

I know the p5 has that problem too, I read on another forum that the plugs that are connected to the switches didnt all get crimped on really tightly and they sometimes wiggle loose. I have that happen and have taken it to the dealer as well and they dont know either. I just deal with it : /
I guess this could be a problem on the 3 too. I will try to find that thread later today.

Heres the link. Its actually for a fix of the p5 controls, but I think it sounds like the same problem, I dont really know if the dealers would do anything about it (covered by warranty or not) hope this gives you some help. http://www.mazdas247.com/forum/showthread.php?t=123678992

Hi guys:
I have a 2005 Mazda 3 Hatchback and recently I have been having problems with the A/C. I'm driving with my A/C on and suddenly I will feel hot air comming through the vents, I will look at the A/C swith and the green light will be off. I will push it several times and the light will come on and the air will get cold again. I have taken my car to the dealer in 3 opportunities with no luck, they have not been able to find the problem.
Any ideas?

Thank you very much Hyperion for your advice. Weekend project.

just keep in mind thats for a p5 may wait to see if someone with a 3 has it too. dont you still have a warranty?

I recently had this same problem with my wife's 2005 Mazda 3s sedan 2.3.

Went to the dealer about 3 times they were unable to fix it while it was under warranty. We noticed that when we hit the side of the dash next to the AC controls the unit would come back on. I also hooked up an OBD II Scanner and saw that the request for the AC was going away and noticed that the green light on the AC unit was going off. Now that the car is out of warranty, I went to a junk yard and picked up the whole AC control unit which included the three controls and the circuit board. Put the new (used) unit in and have not had a problem since.

I checked around the junkyards in Phoenix and found the price for that part ranged from about $45 to $120. Not sure what the part is from the dealer.
The whole job took about 90 minutes to do once i decided to replace that part, and hooking up those control cables can be a little challenging.

Hope this helps!

Guys use the service manual and do to yourself. here the link


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