[Kira]

In our 6 month old Prius:

1. Auto AC is turned off.
2. We turn on Front Defrost.
3. We turn off Front Defrost, and the Prius automatically turns on Auto AC.

Is this normal? It doesn't happen when we use Rear Defrost, only Front.

 

[galaxee]

it does that if you use the steering wheel controls. kinda irritating, as then you have to go into the control screen and manually turn stuff off.

so, sorry to say, it's normal. that was one of the items i submitted to toyota that needed to be changed on future models.

 

[dbird29]

Defrost uses AC

All cars use the A/C to dehumidify the air before heating it.
Normal.

 

[JDavies]

All cars use the A/C to dehumidify the air before heating it.
*****************************************
Are you sure about that..?

 

[redwein]

All cars use the A/C to dehumidify the air before heating it.
*****************************************
Are you sure about that..?

I think this is true for all cars that don't have a specific mechanical button to turn on the A/C. For all cars that I have ever seen that have A/C as just a setting for the climate control it is true.

 

[dbird29]

if you want it to work

There has to be dehumidification.

Perhaps you will believe Click & Clack!

http://www.cartalk.com/content/columns/ ... ly/01.html