Is the climate vents fan powered by 12v battery?

Pretty sure it is 12 V.
But it all comes from the HV supply in the end.

 

Only the A/C compressor and the traction Motor/Generators are high voltage AC, everything else is 12 volts DC. 12 volt DC parts are common and cheap.

 

Yeah I guess just look for orange cables.

 

The compressor tends to cycle on/off fairly frequently, every 30 seconds or so. This was monitoring with a scangauge on my 3rd gen. It also uses varying wattage, say 100 one time, 150 or 200 the next.

 

Yeah likely different demand cases. I noticed (with our 3rd gen) that the AC compressor was sometimes running, if I had vent mode set to heat/defog AND the AC was (supposedly) off, ie: the light on the AC button was NOT lit. Sort of "stealth" AC. And under those conditions the wattage tended to be lower numbers: 100, 150.

This was only sometimes, seemed to depend on ambient temp, and maybe the car measures humidity levels as well? Our AC use is mostly in winter, for defogging, btw.

When I'd expressly pushed the AC button, the light was lit, I'd see higher numbers, 200, 300, IIRC.

 

You don't want the compressor to be OFF for very long because.......as soon as the temperature of the evaporator gets close to the ambient temperature, the moisture on it starts going back INTO the air flow and you immediately feel warm again.