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        General >> Problems >> heater blower switch
        
(Message started by: scorpio197 on Jul 25^th, 2009, 6:51pm)

Title: heater blower switch
Post by scorpio197 on Jul 25^th, 2009, 6:51pm

could some one please tell me if the heater blower switch is the same on all models regardless of A/C or climate or neither.I have disconected mine on setting two as it shorts ,cant see how it can be the blower motor because it works well on setting one and three . :-/

Title: Re: heater blower switch
Post by Simmo on Jul 25^th, 2009, 9:26pm

I can't answer the precise question BUT there is a known problem, similar to yours, in cars fitted with Air Con,as opposed to climate control. The details are HERE (http://www.fordscorpio.co.uk/acthermalfuse.htm) so it may be worth a check. ;)

Title: Re: heater blower switch
Post by gozz on Jul 25^th, 2009, 11:10pm

197.
Do you mean the dashboard switch ? if so cars with climate control don't have one as such,but a control for the automatic module.
The unit to which Simmo refers is a simple rheostat motor control fitted into the top of the evaporator housing,and is a regular source of problems.
GOZZ.

Title: Re: heater blower switch
Post by scorpio197 on Jul 26^th, 2009, 11:07am

thanks for the reply ,I got a new resister from FMD but still have the same problem ,in fact I got a second new one because I thought the first was faulty ,The new ones are much larger and it is not easy to fit them into the housing ,you have to squeeze the resister coils a bit to get the unit into the housing ,but anyway same problem ,works on 1 and 3 but had to disconect the wire for setting 2 because it started to smoke /short .This makes me think it could be the dashboard switch at fault .but the only switch I have spare I took out of a 2 litre executive that did not have aircon I just needed to know if the switch was the same ...regards david

Title: Re: heater blower switch
Post by gozz on Jul 26^th, 2009, 12:50pm

197.
The three positions are the same as cars with no aircon at all,as is the rheostat,however the aircon would need the push in to switch the compressor on.
I would be looking for a shorting wire between the switch and rheostat first.
GOZZ.

Title: Re: heater blower switch
Post by Robzere31 on Jul 26^th, 2009, 5:04pm

on 07/25/09 at 21:26:28, Simmo wrote:

Would you happen to know the operating temp of the thermal fuse?

I have the same problem 1 & 2 not working but 3 is fine.
Shorted the thermal fuse (which was missing) & blower works fine.
Only thing was the coils starting getting very very hot after about 30 seconds.

Alternativly, if someone has the complete unit for sale from a breaker, I'd be happy to buy one.

Title: Re: heater blower switch
Post by Snoopy on Jul 26^th, 2009, 5:14pm

the fix for the termal switch is HERE (http://www.fordscorpio.co.uk/acthermalfuse.htm)
Really easy to fix

It relys on the air flow past it to keep it cool .

Title: Re: heater blower switch
Post by Robzere31 on Jul 26^th, 2009, 6:24pm

on 07/26/09 at 17:14:47, Snoopy wrote:

the fix for the termal switch is HERE (http://www.fordscorpio.co.uk/acthermalfuse.htm)
Really easy to fix

It relys on the air flow past it to keep it cool .

Yep, I've already read that, but I need to know what rating fuse I need to use.
I can get my hands on fuses rated from 110 up to 239.

Title: Re: heater blower switch
Post by lesterlad on Jul 26^th, 2009, 9:38pm

I used a 128c from Maplins on mine, been working ok for the last 3 or 4 weeks.

I believe the original was 110c

Title: Re: heater blower switch
Post by Robzere31 on Jul 26^th, 2009, 9:49pm

on 07/26/09 at 21:38:59, lesterlad wrote:

I used a 128c from Maplins on mine, been working ok for the last 3 or 4 weeks.

I believe the original was 110c

Thanks.

Title: Re: heater blower switch
Post by gozz on Jul 26^th, 2009, 9:59pm

Robzere.
I got the magnifying glass out,it says 121C on the thermal fuse.
GOZZ.

Title: Re: heater blower switch
Post by lesterlad on Jul 26^th, 2009, 10:38pm

Ahh, that's it Gozz 121C for the original, I knew there were two 1's in the equation somewhere ;D

Title: Re: heater blower switch
Post by Gazza_UK on Jul 27^th, 2009, 12:15am

on 07/25/09 at 18:51:18, scorpio197 wrote:

because it works well on setting one and three . :-/

Well its deffo not the thermal fuse if it works on 1 and 3 so its got to be the switch contacts or the wire onto the module
Or even the middle coil itself you will have to meter it out
http://www.fordscorpio.co.uk/images/thermalfuse2_small.jpg

I think its volt meter out and test power from switch to module and go from there