Inerior Heat......its getting hot in here!

[Guest]

As I' m new to the world of Porsche, here' s my question, and I apologise if it' s a dumb question.

Since I have had the car, the interior gets quite hot and it feels as if the heating is stuck on high.

Twiddling the dial between the seats seems to do nothing.....there appears to be no resistance when I twist the dial, it just spins around.

Whats going on and how do I fix this?

Vlad.

PS; when to Eynsham.....couldn' t quite believe how many cars were in the car park and what surprised me even more was that mine was the only one which was painted in a dark green metallic paint ....as mine' s LHD I can only presume that this shade of green was a German/Mainland Europe option only

 

[Guest]

First impressions are that the control knob has broken away from the shaft on the (between seats) switch, or that the switch has in fact broken.
The whole unit is held on by 4 bolts (awkward to get at), and then removing the link to the heater flaps (remove side panel in unit, pull plastic ball joint connector apart).

 

[RSGulp]

Vlad,
You obviously didn' t come across my ' 83 911SC Targa which is (in my opinion) a gorgeous, deep and quite rare dark metallic green called Moss Green (Porsche paint code L20C). There is another dark green on SCs which is known as Oak Green which is slightly more ' earthy' .

I' m not sure why the dark greens are now so rare - maybe fashion in the 80' s dictated your Porsche can be any colour you want as long as it' s Guards Red, Black, White, Silver, Bronze, Brown....etc?

You may find once you' ve sorted the heater control at the ' cabin end' you may need to get under the car and adjust the flaps in the connections on the front of the heat exchangers to ensure they close when the dial is set to ' off' or ' 0' or ' blue' . When you rotate the dial between the seats you should hear a quiet whirring sound as the motors move the cables to open/close the flaps.

 

[Guest]

Thanks for the input.........much appreciated!

Glad to hear that somebody out there has a green SC....mine' s Oak Green.

We could possibly be the smallest Porsche club in the world...the Green Porsche Owners Club!

Lets hear it for the Greens I say.

Cheers

Vlad

 

[AirCooledExcellence]

Hi Vlad,

Take a look at the troubleshooting pages here:

http://www.type-911.co.uk/exhaustparts.htm

Very helpful!

Cheers,

Tim.

 

[Guest]

First thing to do is to open the vents on the flapper boxes fully. Do this either on a ramp or by reaching up under the car just behind the rear suspension arms to the flapper boxes. It should be possible to open them by hand. This will keep the car cools, while you sort out the control end and interconnecing cables, although the flapper box may needs drusting or replacing.

Alan

 

[SJW BASIRE]

The heater on my car was out of action when I bought it.I think someone pulled the red lever and broke it.I decided to replace the autoheat system with the old type 2 lever system as it was cheaper and simpler.They reintoduced it on the 911 Clubsport aswell so that swayed me! I have also managed to pick up a brand new cabrio heater control that looks like the autoheat but is manual with one lever and an on off switch.I may fit that one day.I only paid £15 for it at Husbourne Crawley autojumble a couple of years ago.

 

[bones]

Do you mean that the dial is spinning through 360º? If so pull off the dial, if it's stuck gently pry off with a screwdriver. The dial only fits on one way and should be fixed in the correct position via it's slotted locator on the pin it's attached to. If not this then like most people say check the ball joint that connects to the pink lever between the seats. If you take out the left seat (looking forward) there is an inspection cover or just unbolt the four reataining bolts before you go looking at the heater flaps. I'm jealous you are lucky to have heat!

 

[Guest]

I have just had my car back from a significant front end repair & respray (new wings, bonnet, bumper, oil cooler....) and have started to have this problem also.

I have an 1987 3.2 Targa, and with the heating control between the seats at zero and the dash ventillation controls at the "max. fresh air setting" I am getting hot air coming into the cabin.
If the red lever is in the left position (pointing down) my feet literally burn, and if it is in the right position (pointing to the windscreen) hot air comes out the vents in the dash.

I took the car back to the garage where the repair was done, and they checked the flap operation because they thought they could have been stuck after such a long time being unused. The operation appeared correct and I had the car back.

I have since realised that the heat is only coming in on the drivers side (RHD) and the faster I go the more hot air comes into the cabin. (No suggestions like drive slower or take the roof of please!)

My car didn't do this before the repair, and am getting increasingly hot under the collar about the problem! The rear end of the car was not worked on during the repair, and the heat exchangers are 12 months old.

Please, any ideas or suggestions?

 

[bones]

I've recently had just this problem , new heater flapper boxes were fitted but apparently not checked for correct opersation. Upon inspection one of the heater flapper box springs was missing! Hence when the control indicated 'off' hot air was still passing through to the cabin. The flapper valve has only to be open a fraction for hot air to pass to the cabin. Get the car back up on a lift and double check that the valve is completely shut ie open to let the hot air escape away from the car. I don't know if it's a coincidental or not with the repair work. One last check would be make sure the heater cables are adjusted properly it's easy to check with the car in the air.

 

[bones]

One other thought occurs. Perhaps the work done at the front of the car unblocked a problem there and you are now getting the heat that was previously in the heater tunnels only in the cabin.

 

[sib8292]

Tell you what; how long was the car with the body shop? Its possible that the heater flaps have rusted in situ simply because they weren't being used for a few weeks. You really need to be under the car while someone operates the cabin lever to see if anything happens...Could first try a squirt of WD40 or equivalent on the offending areas. They all seem to need it to stop them sticking anyway.

 

[Guest]

The porka heater is basically on all the time - the warm air is coming out of the heat exchangers all the time the motor is running.
The only thing stopping the hot air from going to the cabin are the flap boxes. These valves are located above the gearbox/axles.
The correct operation of these valves is a little confussing; with the heater controls 'on', the flap valves should be closed! What this means is the outlets ( to atmosphere) on the flap boxes are closed. This forces the warm air into the cabin.
If this is what is happening and you still sense warm air in the cabin ( and this is the case with my 911), then I suspect a negative air pressure is occuring in the cabin - there by inducing air to travel up the heater ducts.
The negative air pressure could be caused by a window or sunroof open?
Check the cables from the control unit (between the seats) to the heater flap boxes- are they broken or stiff.[]

 

[Guest]

negative air pressure is occuring

Coo, getting technical ! Could it be not using 4th/5th gears ? (Sorry, couldn't resist !)

 

[Guest]

Bon Soir

Some consolation but my 944 does the same, creating an onboard sauna, sorry to hijack a 911 thread! The finer details of cabin temperature control are a generic Porsche mystery.

Ref parking Eynsham my son and I actually remember your car (we think!) from last year when we marshalled PCGB parking.
Say hello Sun Am if you see us in the Porsche Car Park, two big chaps marshalling the cars.

KEITH SCZ

KEITH SCZ