[928uk] Heater fan control

[Ian Salisbury via 928uk]

Thanks guys I'll keep you posted!

Ian Salisbury
Salisbury Associates
07748750084

> On 10 Oct 2015, at 20:59, Adrian Langford via 928uk <928uk at lists.928.org.uk> wrote:
> 
> Thanks Alex, sounds like the fail ode very similar to earlier resistors so I was mistaken. Hope Ian's is as easy a fix. 
> 
> Adrian
> 
> iPhone therefore I am
> 
>> On 10 Oct 2015, at 20:30, Alexander Popov via 928uk <928uk at lists.928.org.uk> wrote:
>> 
>> My GTS has the later style resistor pack - had exactly the same problems. Bend the spring look-a-likes just a touch higher and hey presto - a fan with 4 speeds. Shame I had ordered the new pack from Porsche when I managed to fix it. 
>> 
>> Sent from my iPad
>> 
>>> On 10 Oct 2015, at 20:02, Adrian Langford via 928uk <928uk at lists.928.org.uk> wrote:
>>> 
>>> That's what I thought at first Paul, but Ian's car has the later resistor pack with the normally closed temp switch. When the resistors overheat it will cut power to blower motor, which is opposite behaviour to the pre 89 resistor pack. The new resistor pack is described in the 89 Tech Info. 
>>> 
>>> He may have problem with switch itself, or the HVAC controller, but I hope it is simple resistor pack replacement. 
>>> 
>>> Cheers
>>> 
>>> Adrian
>>> 
>>> iPhone therefore I am
>>> 
>>>> On 10 Oct 2015, at 16:07, Paul Lacey <t595 at btopenworld.com> wrote:
>>>> 
>>>> Hi,
>>>> It will be the resistor pack 99% for sure
>>>> There is a bi-metal strip connection that breaks the fan circuit if the resistor pack overheats. However the fan will still work on setting 4 since this does not pass through any resistors, thus allowing to cool down the resistor pack.
>>>> Take it out, clean the contacts, check with a meter and if required tweak (bend) thee bi-metal strip a tiny bit.
>>>> 
>>>> P.S. wire coat hanger bent to have a small hook on the end is most useful tool for this. It looks like a disaster if you drop the resistor pack down into the heater but it isn't, you can fish it out with mentioned hook
>>>>  
>>>> Best Regards,
>>>> Paul Lacey
>>>> 
>>>> From: Adrian Langford via 928uk <928uk at lists.928.org.uk>
>>>> To: Ian Salisbury <ian at salisburyassociates.co.uk> 
>>>> Cc: "928uk at lists.928.org.uk" <928uk at lists.928.org.uk> 
>>>> Sent: Saturday, 10 October 2015, 10:31
>>>> Subject: Re: [928uk] Heater fan control
>>>> 
>>>> Hi Ian
>>>> 
>>>> Your post led me to look at difference between the 89- "series resistor" and the earlier "bimetal switch".  
>>>> 
>>>> The newer pack does not have bimetal switch. When the newer one overheats it cuts power to fan entirely. The old one applies full power via the bimetal strip closing contacts, as if position 4 selected. 
>>>> 
>>>> So it may still be resistor pack failure (maybe Richard A knows if newer ones can show this failure mode), or it could be fault in HVAC controller I think. 
>>>> 
>>>> Cheers
>>>> 
>>>> Adrian 
>>>> 
>>>> iPhone therefore I am
>>>> 
>>>> > On 10 Oct 2015, at 08:54, Ian Salisbury via 928uk <928uk at lists.928.org.uk> wrote:
>>>> > 
>>>> > Morning all - I have lost fan speed 1, 2 and 3 on trading heater/aircon. Position 4 is fine. Is the switch within the control knob? Does it just pull out for a swop or is it fuse???
>>>> > 
>>>> > Ian Salisbury
>>>> > Salisbury Associates
>>>> > 07748750084
>>>> > _______________________________________________
>>>> > 928uk mailing list
>>>> > 928uk at lists.928.org.uk
>>>> > http://lists.928.org.uk/cgi-bin/mailman/listinfo/928uk
>>>> 
>>>> 
>>>> 
>>>> _______________________________________________
>>>> 928uk mailing list
>>>> 928uk at lists.928.org.uk
>>>> http://lists.928.org.uk/cgi-bin/mailman/listinfo/928uk
>>> _______________________________________________
>>> 928uk mailing list
>>> 928uk at lists.928.org.uk
>>> http://lists.928.org.uk/cgi-bin/mailman/listinfo/928uk
>> _______________________________________________
>> 928uk mailing list
>> 928uk at lists.928.org.uk
>> http://lists.928.org.uk/cgi-bin/mailman/listinfo/928uk
> _______________________________________________
> 928uk mailing list
> 928uk at lists.928.org.uk
> http://lists.928.org.uk/cgi-bin/mailman/listinfo/928uk
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.928.org.uk/pipermail/928uk/attachments/20151010/2973ea64/attachment.htm>