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Another Autoheat post for Carrera

I have a 1985 Carrera and since ever my booster fan on number 9 on rotary switch does not work.
Everything else 1-8 works FWB all ok just when i put the 9 on all FWB stop.
I di some reading over the weekend all the way back to 2005 posts by Mystery train and AJ88....addressing several problems.
On my front trunk black relay for the booster fan ,if i cross 87 to 87a the fan kicks in.
87a has a power from 30 and 87 is a ground.....
Also idea was to disconnect the resistor middle wire to bypass it.But it is almost impossible to remove the wire from it....
Any ideas ...?

Ivan
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1985 911 with original 488 397 miles..Origin Euro model well traveled.Germany -Finland-California-France.
Old 02-12-2018, 11:15 AM
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nobody? where is timmy2....??
Ivan
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1985 911 with original 488 397 miles..Origin Euro model well traveled.Germany -Finland-California-France.
Old 02-12-2018, 10:57 PM
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Auto heat.

pm me.

Gerry
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Old 02-13-2018, 07:24 AM
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Don't use #8 use the other 7.
Old 02-13-2018, 07:45 AM
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don't use 9,
fan speed is still the same for 8 as for 9...well not yours since 9 is off.

problem is the switch at the controls most likely.

that relay is for hi speed only.

there are only 3 speeds, low med and hi.
hi is 10
med is like ,8 and 9
and low is 1-7
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Last edited by T77911S; 02-13-2018 at 09:56 AM..
Old 02-13-2018, 08:02 AM
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thank you for re: boys..but the number 9 is the only speed with boost...number 8 is just a little faster then 7 ...let`s say i would driving early in the morning and the car would be outside over nigh(none of this will most likely happen) and i wanted to defrost the front windshield asap the booster will do this..yes i do know use the fresh air fan instead....

Like i have written i never use the 9 in 20 years but reading and having time on my hand i wanted to fix something;-)

T77.. i thing once before i played with this i have tried different -complete auto heat box and it was the same..still ..i`m thinking ground somewhere ...
Ivan
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1985 911 with original 488 397 miles..Origin Euro model well traveled.Germany -Finland-California-France.
Old 02-13-2018, 09:12 AM
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no
I have taken it completely apart and know how it works.
if you want to def. or hi, use "10"
8-9 are all the same speed. MED
1-6 is LOW
I correct myself on the low.

here is my post, if you want more info than you know what to do with then click on the first link I posted.

auto heat- foot well blowers part deux.
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86 930 42kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
05 BMW 330CI 130K:: [__] RUNNING: [__] NOT RUNNING:
08 VOLVO V70 190K:: [__] RUNNING: [__] NOT RUNNING:
90 B2200[__] RUNNING:[] NOT RUNNING:__2000 MER E320 WAGON [] WRECKED:[]RUNNING:

Last edited by T77911S; 02-13-2018 at 09:56 AM..
Old 02-13-2018, 09:49 AM
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t77..ok i will dig into it

thanx

Ivan
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1985 911 with original 488 397 miles..Origin Euro model well traveled.Germany -Finland-California-France.
Old 02-13-2018, 10:03 AM
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Lol, I really know nothing about the inner workings of the autoheat system.
Never had a car with it, so haven’t had to work on one.
I’ve seen a lot of posts about them over the years. That is about all I know...
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Old 02-19-2018, 02:05 PM
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hi Dennis..thanx for re:

Ivan
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1985 911 with original 488 397 miles..Origin Euro model well traveled.Germany -Finland-California-France.
Old 02-19-2018, 02:22 PM
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