Air Con not working in Accessory Mode?

[Tideland Prius]

Originally Posted by LRKingII

Foot off brake and 2 pushes on power button when parked.

1 push.

2 pushes gets you to IG-ON (or ON in other cars). 1 push gets you to ACC or accessory.

Originally Posted by Mister Neutron

Hi All,

Still very new to the Prius, so this may just be a 'RTFM' issue, but I noticed that the air conditioning stops when stationary and in Accessory Mode. Is this normal? I'd have thought that you'd want the A/C to be fully functional when parked in the sun, rather than just having the fans working (which is all I got?)

When everything was powered fully back up, 'Ready' on and moving, the A/C quickly cooled me down, but...

AFAIK, no car runs the A/C unless the engine is on and it's no different in the Prius. The car must be in READY mode before the A/C compressor runs. In IG-ON mode (2 pushes of the POWER button without pressing the brake pedal) simply gives you the fan like any other car.

[jay_man2]

Originally Posted by adamace1

I don't think your ac works in accessory mode. That mode runs off the tiny little battery, I am pretty sure you need to have it in ready mode, so the ac can run off the HV batt.

When you hit the power button once without a foot on the brake the radio comes on. Hit it again and the fan starts blowing and the rest of the dash lights up. All I know is every time I've done it I get cold air from the vents, but that may just be the fan pushing already cold air around.

[Shawn Clark]

Originally Posted by jay_man2

When you hit the power button once without a foot on the brake the radio comes on. Hit it again and the fan starts blowing and the rest of the dash lights up.

That's because you just turned the car on with the second press.

The little 12V battery won't run the AC compressor. It could probably run the blower (don't know if it does or not as I haven't tried.) Conventional cars can't run the actual AC compressor with the engine off since it is belt driven off the engine. The Prius can use power for the traction battery to run it when in ignition on mode.