Interesting. Do you recall what the illuminated label on the dash said for this feature's control? The plain air rear fan is labeled "REAR AIR" on my 68. Perhaps the rear heated air device was called "REAR DEF"? There isn't room for much more on the label. For those without these features, there is a provision for additional feature controls along the lower portion of the left side of the dash. This is where the twilight sentinel, auto pilot, rear air and convertible top controls go. There is a provision for illumination of the controls, with optional metal panels (brass or wood covered for 68/67s) to hide the workings behind the panel. I have already rebuilt my two 67's headlight switches, so it's too late for me, but there is an NOS 67/68 headlight switch running on eBaY right now. Dick Benjamin ----- Original Message ----- From: "Ken Miller" <kdmiller@xxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Monday, January 27, 2003 9:23 PM Subject: Re: IML: 1967-8 Rear Air > > > Dick Benjamin wrote: > > I'm wondering if any Imperial of the boxcar variety had genuine dual AC. > > > I don't know the answer to that specific question, but the 67 Crown I > parted had a rear heater. It consisted of a heater core, fan and duct > work. Hot water from the cooling system ran in reinforced pipes down > the edge of the undercarriage and into the trunk. There was a control > on the dash for fan speeds but I don't remember where the temperature > control was. > > Ken Miller > > > >