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Author Topic: Heater Blower  (Read 1788 times)

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Andrew41

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Heater Blower
« on: 14 December 2009, 11:56:25 »
I have a 3l elite, 96 plate. The heater blower wont go off not even if the ignition switch is off and key out!! The only way i can stop the blower is by pulling the 30A fuse out under the dash. When it is blowing it is on full and the speed control on the dash does not slow it any. The controls to make it blow in different areas works! It was all working fine. Can anyone have any idea why this is.
Thanks Andy
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Marks DTM Calib

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Re: Heater Blower
« Reply #1 on: 14 December 2009, 13:02:30 »
Sounds like the fan speed controller......these can cause trouble if the scuttle drain is blocked and water gets into the fan ducting.

So

1) Check your passenger footwell for wetness.
2) Check the scuttle under the bonnet (rear o the engine bay on the passenger side below the plastic cover) is empty (i.e. no water) and unlbock the drain hole (there is a guide I think in the maintenance section).
3) Remove and replace the speed controller, get a knwon good second hand one off one of the breakers on here
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Andrew41

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Re: Heater Blower
« Reply #2 on: 14 December 2009, 17:33:30 »
would the speed controller cause the blower to stay on even when the ignition is off?
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Marks DTM Calib

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Re: Heater Blower
« Reply #3 on: 15 December 2009, 12:31:44 »
Yes, it is a FET absed setup which takes a speed signal from the climate panel and turns that into the required speed on the fan.

Hence, if it gets water in it, it can cause the fan to stay on.
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Andrew41

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Re: Heater Blower
« Reply #4 on: 15 December 2009, 15:54:49 »
Update on my problem.... I have the fan blowing full and the only way to stop it is pull the fuse. I have heat blowing out of the drivers side and cold blowing out the passenger side...  ::)
Its doing my head in this stupid car.
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robson

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Re: Heater Blower
« Reply #5 on: 17 December 2009, 19:04:23 »
Have just found your post I have the same probem have you solved it
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Andrew41

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Re: Heater Blower
« Reply #6 on: 20 December 2009, 01:18:19 »
No not as yet. I have had it in a garage and they gave up!
They had the fan unit out it tested ok there is power everywhere but when it is all connected up it dont work.
Sometimes the fan will not come on at all, then suddenly it comes on, then i cant turn it off or just stop it blowing on full power unless i pull the 30A fuse out.
But not all the time do i have cold out the passenger side vents just some times and when it does the car mist's up real bad... the hot and cold mixing!!
Its like the air con is on at the same time as heater.
If you do find out something please keep in touch. Cheers Andy
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Ian_D

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Re: Heater Blower
« Reply #7 on: 20 December 2009, 01:31:06 »
Like Mark says,

Have you checked that the scuttle drain isn't blocked? They tend to fill with water, which will then leak into to fan motor / electrics. The water could cause the fan to turn on to full speed if it gets inside the speed controllers as FET's are very sensitive.
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[size=12]
LMF are utter rubbish - dont buy steering idlers from them! You've been warned![/size]

Andrew41

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Re: Heater Blower
« Reply #8 on: 20 December 2009, 01:41:16 »
I will go and check 2morrow but it was only a month or so ago it was cleaned out after finding it blocked and yes water was 2" deep in there. This control were is it do u know?
How will i know.... there is no damp as far as i can feel.
Cheers
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Andrew41

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Re: Heater Blower
« Reply #9 on: 20 December 2009, 01:44:51 »
and could that controler cause the other bizzar things it does?
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Ian_D

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Re: Heater Blower
« Reply #10 on: 20 December 2009, 13:26:50 »
Could try resetting the climate panel.

No 100% sure on how you do it - I think you hold down auto and off for a couple of seconds??


Only other thing I can think is if the wire behind the climate panel is 1/2 unplugged?
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[size=12]
LMF are utter rubbish - dont buy steering idlers from them! You've been warned![/size]

robson

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Re: Heater Blower
« Reply #11 on: 20 December 2009, 16:26:42 »
Rather odd this one did the garage try a new speed controller This is what I will try on mine when the weather improves A new controller from Main dealer is about £130 I will try a breakers. Best of luck and keep me informed I wonder whether it is linked to the cold weather just like eurostar
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Andrew41

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Re: Heater Blower
« Reply #12 on: 17 January 2010, 14:46:45 »
Hi all again,
New problem, i have had my car in the garage now, the hedgehog has been changed and i have a blower/heating again.
Day after blower stopped working again,the next morning was working again but now i have heat on the drivers side and cold- air con' cold on the passenger side. What the hell is going on????
My next line of attack is a gallon of petrol and a box of matches!!
Help please.
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RobG

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Re: Heater Blower
« Reply #13 on: 17 January 2010, 14:57:39 »
Quote
Hi all again,
New problem, i have had my car in the garage now, the hedgehog has been changed and i have a blower/heating again.
Day after blower stopped working again,the next morning was working again but now i have heat on the drivers side and cold- air con' cold on the passenger side. What the hell is going on????
My next line of attack is a gallon of petrol and a box of matches!!
Help please.
Read this http://www.omegaowners.com/forum/YaBB.pl?num=1196616207
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