Boxster AC

[Daniel Trofin]

Hello Porsche lovers,

Have a big problem with the AC on my car a boxster 2.7 from 2003, pressing the snow button but ventilators don't start, kompresor kicks, if I will rev the engine shortly the gas will be released trough the expansion valve, short story is that ventilators are not starting, I changed already the AC unit, I checked the fan reley and don't start even when short is applied.

Currently i'm using a wire from contact to ventilators, every time I start the engine they will run as well but this is not a proper way to be used.

Appreciate if some of you with more experience could help.

[flyingpenguin]

When you say ventilators, I take it you are referring to the radiator fans upfront. From your description, the fan motors appear to be operational, so it must be something in the control electronics or the wiring to the fans. Proper diagnosis would require something like a Durametric cable & software, allowing you to activate each fan separately.

[Daniel Trofin]

When you say ventilators, I take it you are referring to the radiator fans upfront. From your description, the fan motors appear to be operational, so it must be something in the control electronics or the wiring to the fans. Proper diagnosis would require something like a Durametric cable & software, allowing you to activate each fan separately.

After paying more than 3000$ on general diagnoses and my car still not running i'm trying to do'it myself now...mechanics said that is the AC unit...i replaced, after  that they blamed the TCM(Transmission control module) even after i fix it i bought a second of to be sure, now they said is the wiring of the car and is very complicated and i should sell the car...

In Abu Dhabi i don't have other options/mechanics, last night when i was driving i noticed that the light for clima is not open, everything else seems to work normal, i just need to make the front ventilators start from the snow button only...and i don't know how else to try them

[wizard]

You might check the ballast resistors, which I believe are mounted on the front fan shroud.

If you do a forum search for "ballast resistor", I'm sure you'll find that the problem is fairly common, particularly for cars operating in high temperatures.