Re: 47 Custom rear seat heater

Posted by HH56 On 2012/11/20 14:17:21

I think you may be right about the switches and maybe that is the stock configuration. There is another unit available but I don't know what year it was originally for. A friend has one on his 47 and it is wired the way I mentioned.

Unfortunately the manuals are less than spectacular on the switch identification. Doesn't mention much on the whole right side group. The heater is only referred to in the fact book by pointing to the accessory section. Didn't see a proper reference to defroster at all. Unlike the owners manual, there is a decent picture of the switches in the acc catalog but not much info.

The unit Bob has looks very much like the dash mounted defroster/footwarmer unit you just mentioned but it has a small motor and blower assembly mounted to the top of the case. The bottom front area has a small door but don't think it has the 2 side pointing doors. Just don't remember on those.

The heater switch turns on the internal fan which blows heated air thru the bottom of the case. In Bob's car, a round hang on switch mounted to the right of ashtray to kind of complement the OD knob turns the underseat heater on. It is obviously an add on. For a defroster, that dash switch turns on the small motor blower assy which sucks heated air thru the top of heater case and out to the windshield.

I'd be very curious as to what year(s) had the extra little blower on top and pictures if anyone has some. It doesn't show in the 46 acc catalog. That does show the footwarmer/defroster setup, underseat setup and a third heater that says it has a built in defroster which appears to be configured like the prewar units but no other info.

As far as the heater accessories, curiously, that acc catalog shows a knob which says "Cooling". I wonder if that took the place of the one for the heater vent system that used to be labeled "Fresh Air"