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Problems with heating and blower system #1634388
02/08/2019 08:28
02/08/2019 08:28
Joined: Aug 2010
Posts: 41
Birmingham England
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Heatseeker Offline OP
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Birmingham England
After turning the ignition on even with the center knob in the zero position After about 30 seconds and a bit of clicking behind the center console the blower heater starts and won,t go off.My model is a 20v na with climate control. I ve taken the console out disconnected all the connectors even the one behind the center fan speed knob and it still stays on!!! The one thing ive noticed is the little fan doesn t spin (is it supposed to as soon as you turn the ignition on). I changed the resistor but no difference. Anyone got any ideas please

Re: Problems with heating and blower system [Re: Heatseeker] #1634405
02/08/2019 16:08
02/08/2019 16:08
Joined: Mar 2007
Posts: 10,993
Auld Reekie
Edinburgh Offline
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I AM a Coop

Joined: Mar 2007
Posts: 10,993
Auld Reekie

You might find this howto useful (in the FAQ and How-to section)


Thanks again, Photobucket.
BumbleBee under restoration, in paintshop!...
Re: Problems with heating and blower system [Re: Edinburgh] #1634407
02/08/2019 18:07
02/08/2019 18:07
Joined: Aug 2010
Posts: 41
Birmingham England
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Heatseeker Offline OP
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Posts: 41
Birmingham England
thats brilliant i will have a go at that ..but i just don t understand why the fan blows even with that center switch disconnected ..but i ll get there . Thankyou for the reply and help..Regards Rob

Re: Problems with heating and blower system [Re: Heatseeker] #1634432
04/08/2019 09:59
04/08/2019 09:59
Joined: Aug 2010
Posts: 41
Birmingham England
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Heatseeker Offline OP
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Posts: 41
Birmingham England
Still comes on 30 secs after the ignition is turned on ???

Re: Problems with heating and blower system [Re: Heatseeker] #1634433
04/08/2019 11:43
04/08/2019 11:43
Joined: Dec 2005
Posts: 7,282
Lightwater, Surrey, UK
DaveG Online content
Club Member 311
DaveG  Online Content
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Forum is my life

Joined: Dec 2005
Posts: 7,282
Lightwater, Surrey, UK
Sometimes the ECU that controls the heating/ventilation can "go bad" and malfunction, trying another known good ECU from another Coupe can help identify it that's the problem. When you said you "changed the resistor" what do you mean? The large resistor that sits underneath the glove box next to the blower fan? Was it a correct new part, tested used part, or what? The little fan can fail, again try a known good one if you can get hold of one.


1996 Portofino 20vt & 2000 Pearl White Plus
1985½ & 2016 2017 Fiat 124 Spider + XF Sportbrake
Re: Problems with heating and blower system [Re: Heatseeker] #1634436
04/08/2019 13:01
04/08/2019 13:01
Joined: Aug 2010
Posts: 41
Birmingham England
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Heatseeker Offline OP
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Birmingham England
the resistor was from a supplier Ant ..the ecu and the minifan units are difficult to find. The blower even comes on with the 20amp fuse pulled out

Re: Problems with heating and blower system [Re: Heatseeker] #1634437
04/08/2019 13:22
04/08/2019 13:22
Joined: Mar 2007
Posts: 10,993
Auld Reekie
Edinburgh Offline
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Edinburgh  Offline
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I AM a Coop

Joined: Mar 2007
Posts: 10,993
Auld Reekie
It's a long shot, but when the fan next comes on try stuffing your hand up the back of the radio (careful not to cut yourself on the sharp edges of the frame) and wiggling the main wiring loom a bit - sometimes the sheathing frays and exposes bare wires....


Thanks again, Photobucket.
BumbleBee under restoration, in paintshop!...
Re: Problems with heating and blower system [Re: Heatseeker] #1634438
04/08/2019 13:42
04/08/2019 13:42
Joined: Aug 2010
Posts: 41
Birmingham England
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Heatseeker Offline OP
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Posts: 41
Birmingham England
I will do that now ...cheers

Re: Problems with heating and blower system [Re: Heatseeker] #1634439
04/08/2019 17:16
04/08/2019 17:16
Joined: Aug 2010
Posts: 41
Birmingham England
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Heatseeker Offline OP
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Posts: 41
Birmingham England
no progress so its find the ecu and little fan and do the substitution method

Re: Problems with heating and blower system [Re: Heatseeker] #1634519
07/08/2019 16:26
07/08/2019 16:26
Joined: Aug 2010
Posts: 41
Birmingham England
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Heatseeker Offline OP
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Birmingham England
Update today got a fan and circuit board fan works great but no improvement so its the mini B837 magnetti Maralli


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