Use the search. Heating

RFR · 11-25-2006, 08:11 PM

Yeah, yeah. I know that is what someone will tell me. Well I did.

Read as much as I could and it still makes no damn sense.

could someone explain in plain english how the 78 system works?

Does a 78 have footwell blowers,

how come the idiots in the manual say lower two and upper two levers when there are only 3 levers.

The dash lever sytem is the stupidest set up I think I have ever seen.

Ok done ranting

slodave · slodave's Garage

Do you have any levers by your e-brake? Those control the flapper boxes and let the heat in...

Dave

randywebb · 11-25-2006, 08:18 PM

It is unusual, isn't it? And I understand how frustrating it can be to first understand. We've all been there with trying to learn it. But when you think about what exatly each lever is designed to do, it all makes perfect sense.

Here is the official FAQ on the system for you:

Heat Control FAQ for Pooschey

Q: I just bought a Pooschey 911 and can't figure out how to make the heater work -- or the fresh air either. Can you help me?

A: Sure, I can help you. The ventilation system requires that you operate 4 levers to make it work. 3 of the levers are on the dash, and the other is between the seats on newer Pooscheys there are 2 levers between the seats).

The top lever on the dash actually does several different things (remember, it is a fiendish German device, just like the rest of the car). Pushing it to the middle opens the dust ports leading to the windshield (see below for operation of fogging machine and oil mist spray device). Pushing it to the right past the middle also activates the rattling noise-maker device. There are three loudness levels to choose from. Pushing the lever all the way to the left is used to jam the cable so unauthorized personnel cannot operate any of the devices above. The lever also enables the automatic heat exchanger signaling device -- when opening it spews rust particles on the windshield, you should replace the heat exchangers. Also, if opening it causes you to immediately turn blue or purple (not just hair, but skin color) and become unconscious, you (or your estate) should definitely replace the heat exchangers.

The second lever from the top controls the lights on the White House Xmas tree. Move it to the middle to turn on the lights, and all the way to the right to fire 4500 Megatons of Nukes at Iran.

The bottom lever on the dash is used to replace the windshield when it becomes scratched or pitted with rock chips. It also determines how much hot air goes to your feet as opposed to your head. For example, let's say the engine is completely warmed up and the hot air is burning your feet. If it's a cold day, you can flip the lever to the other side and shoot hot air onto the windshield so it cracks and shatters. Then call your insurance company (you do have insurance, don't you?)

The lever between the seats controls the oil mist spray device. When the engine is warmed up, this lever allows you to blow oil mist into the passenger cabin. Using the top dash lever lets you select whether you want the oil mist to coat the inside of the windshield or to just circulate around your feet. On a newer Pooschey, you have 2 levers on the floor between the seats. The left hand lever lets you open the left side vents which are aimed so they burn the feet of the person in the right hand seat, and the right hand lever lets you open the right side vents which are aimed so they burn the feet of the person in the left hand seat. Of course, each lever will also burn just the tops of the feet of the person in the other seat. If you are driving in the rain (or even stopped in the rain after the car has broken down), these levers also let you spray a fog of water vapor on the windshield, so no one can see in or out of the car -- sort of like privacy glass.

RFR · 11-25-2006, 08:18 PM

Oh yeah, those are the only ones that make any sense. Something is the matter with my blower in the engine compartment, so the connection is unplugged. If the rear blower is plugged in it blows fuses.

So I just pull up on the levers and hot air kind of trickles in to the cabin.

RFR · 11-25-2006, 08:22 PM

Randy, now I understand fully! that's great!!

Zeke · 11-25-2006, 08:27 PM

Top lever opesn fresh vent on hood air and on later models controls fan speed from center to full right. Left is all closed and off.

Center lever sends fresh air up or down, your choice.

Bottom (red lever) does the same for the incoming heat.

Floor lever(s) let the amount of heat in that you desire.

Of course, my car is different than the rest, so that's how I have to do it.

Danny_Ocean · 11-25-2006, 08:34 PM

Can someone explain the lever next to the e-brake handle? I tried moving the lever and it appears to be run by a motor. It does not move manually. There is also a rotary knob above it that says "DEF" and 1 ~ 3(?). My car is a '79SC ROW.

RFR · 11-25-2006, 08:37 PM

Thanks both Randy and Milt your explanations make sense.

Randy, in your own way of putting, explains a lot.

Milt your answer was simple and to the point with just a hint of sarcasm.

I think my system is all F***ed up.

My blower in the back is non op.

I have a set of switches by the e brake just dangling ( i
think the defrost)

When I use my dash fan ( rattle generator) the little hot air turns cold.

I am not looking foward to fixing this crap.

slodave · slodave's Garage

Try this link if you want to remove your heater blowers and if you have the same footwell blowers I do. They work really well now and there is even enough heat blowing out while the car is idling.

Dave

randywebb · 11-25-2006, 08:47 PM

If you are going at hwy speeds then pulling up on the tunnel lever(s) should get some hot air into the cabin - no matter what is wrong w/ the blower(s).

I'm not sure when the rear blower was added but the early cars do not have one.

The side footwell blowers were there on Carrera's - not sure if there on SC's or not.

They used to put a diagram in the Owners Manual - if they did for your car, then maybe it will discuss the blowers.

Also, the Bentley manual should cover this. Unfortuantely, my interest in the later cars is only for go fast parts to cannibalize for my '73. Others will know the newer cars inside & out - they may not be on the bbs until tomorrow tho.

RFR · 11-25-2006, 09:06 PM

SloDave, nice writeup in your link.

Question; Does a 78 SC have footwell blowers or just the blower in the engine compartment?

Randy, pulling up my center levers does provide heat ( when moving )

When I put on my dash fan ( rattle maker ) it kills the hot air and blows cold.

I guess porsche A/C works GREAT at night in the winter ;-)

thanks for the tips and info guys.

BTW, I finally figured out what SC stands for. super crap or *****ty car
;-)

slodave · slodave's Garage

Ok, So you should not have footwell blowers by default. Some have added them for better heating in their SC's. Here is a link to a thread and embedded thread on how to add them if so desired. Seeing that you are from L.A., it does not seem like you actually would need the blowers. I was able to get my right side working again and now with just levers and the pieces I added, there is too much heat. I am over the hill from you and would be glad to help in anyway I can. <-- whatever direction you go.

Dave

RFR · 11-25-2006, 09:28 PM

Hey man, that is awful nice of you Dave!
I am over in the granada hills area. I would love to meet to just talk cars. I have never even been on a porsche run or met any of you folks.

I bet some people wonder if I even own a Porsche. ;-)

slodave · slodave's Garage

Heh, I think of "L.A." as over the hill. G.H. makes it all that much easier. Wow, you should have joined us on the T-day run. Was loads of fun! I'll PM you my cell. Give a call. I am around until the snow falls (in Mammoth).

Dave

450knotOffice · 450knotOffice's Garage

Get yourself a Bentley manual and fix each section one at a time. It really isn't all that complicated if you attack one area at a time.

Danny, I'm pretty sure you should have TWO little heater levers down there. They should each pull up manually. If they don't, you very well may have corroded heater flapper valves that are jammed.

Danny_Ocean · 11-25-2006, 10:35 PM

Quote:

Originally posted by 450knotOffice
Danny, I'm pretty sure you should have TWO little heater levers down there. They should each pull up manually. If they don't, you very well may have corroded heater flapper valves that are jammed.

I looked closely, and there is only one and no fittings for another. When I try to move the lever, I can hear a motor/gears spinning and there is much resistance (kinda like the car toy you had as a kid where you run the wheels on the floor to get them spinning). I can lift it manually, albeit VERY slowly and only as fast as the motor will allow it. When I turn the ignition on, the motor starts whirring and the lever returns to the full-down position.

slodave · slodave's Garage

Quote:

Originally posted by Danny_Ocean
I looked closely, and there is only one and no fittings for another. When I try to move the lever, I can hear a motor/gears spinning and there is much resistance (kinda like the car toy you had as a kid where you run the wheels on the floor to get them spinning). I can lift it manually, albeit VERY slowly and only as fast as the motor will allow it. When I turn the ignition on, the motor starts whirring and the lever returns to the full-down position.

Is it possibly automatic? I did a search and it seems like you may have an auto system.
Dave

fintstone · fintstone's Garage

Try these links for heater info:
http://www.dietersmotorsports.com/tech/2001/03-01_911_heater.htm
http://www.porschenet.com/bruns02.html
http://www.type-911.co.uk/images/exhausts/heatingtech1.jpg
http://www.type-911.co.uk/images/exhausts/heatingtech2.jpg
http://www.type-911.co.uk/images/exhausts/heatingtech3.jpg
http://www.type-911.co.uk/images/exhausts/heatingtech4.jpg
http://www.type-911.co.uk/images/exhausts/heatingtech5.jpg
http://www.type-911.co.uk/images/exhausts/heatingtech6.jpg

Danny_Ocean · 11-26-2006, 06:33 AM

Quote:

Originally posted by slodave
Is it possibly automatic? I did a search and it seems like you may have an auto system.
Dave

I dunno. Being in FLA, I have no use for the heat, so I haven't tried too hard to figure it out. But I know it doesn't work like other Porsche's I've seen with the manually operated levers.

TerryH · TerryH's Garage

Thanks for the laugh, Randy.

After 3 years of SC ownership I never figured out the heating/venting system. Hell, I live in southern California, so I never had to. The rear blower was obviously dead when I bought it, so I did the backdate and cleaned up the engine compartment. I never heard or felt any air from the front, so not sure if was operator error, a fuse, or blower motor..... but again, I didn't miss it.

The electric rear window defroster worked.