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Author Topic: Heater control problem - only 1 speed  (Read 2920 times)

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the hamster

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Heater control problem - only 1 speed
« on: 16 April 2007, 16:38:44 »
Hi, this is on my Astra CDX but i'm sure they must be the same/similar to the Omega.

Basically the problem is that I only have 1 speed on the control switch  >:(.

Number 1/2/3 dont work then number 4 comes on at full chat! I used to get 3 and 4 until recently but now 3 has given up too.

I've tried replacing the switch, fuses and even checked the wiring is secure on the back of the switch.

Is there something i'm overlooking here or is it a bit more technical than that

Any help is appreciated
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Marks DTM Calib

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Re: Heater control problem - only 1 speed
« Reply #1 on: 16 April 2007, 16:42:41 »
First up....what model year.....

The fault will be a knackered speed control resistor....its location is model year dependent......but is normaly mounted on the blower motor....
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the hamster

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Re: Heater control problem - only 1 speed
« Reply #2 on: 16 April 2007, 17:10:43 »
i'm liking this!

Its a 1996 N reg 1.6 16v CDX

Thanks for the quick replay mate.
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Marks DTM Calib

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Re: Heater control problem - only 1 speed
« Reply #3 on: 16 April 2007, 17:30:41 »
From memory....the blower is below the plastic scuttle cover at the rear of the engine bay and has the resistor mounted on it....

Its an easy one to diagnose as the resistor is not used with the fan at full speed, only on the lower settings...

Seem to remember that the resistors can be bought seperatley...in fact heres one on ebay....but check its the right one first...

http://cgi.ebay.co.uk/Vauxhall-ASTRA-F-MK3-HEATER-BLOWER-FAN-RESISTOR-NEW_W0QQitemZ180090646295QQihZ008QQcategoryZ10404QQrdZ1QQssPageNameZWD1VQQcmdZViewItem
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Markie

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Re: Heater control problem - only 1 speed
« Reply #4 on: 16 April 2007, 17:45:46 »
Quote
From memory....the blower is below the plastic scuttle cover at the rear of the engine bay and has the resistor mounted on it....

Its an easy one to diagnose as the resistor is not used with the fan at full speed, only on the lower settings...

Seem to remember that the resistors can be bought seperatley...in fact heres one on ebay....but check its the right one first...

http://cgi.ebay.co.uk/Vauxhall-ASTRA-F-MK3-HEATER-BLOWER-FAN-RESISTOR-NEW_W0QQitemZ180090646295QQihZ008QQcategoryZ10404QQrdZ1QQssPageNameZWD1VQQcmdZViewItem


Wow reminds me of the rovers - heater resistors always blow on them
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JasonH

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Re: Heater control problem - only 1 speed
« Reply #5 on: 16 April 2007, 17:46:15 »
Yep - resistor pack.

Neighbour had the same problem. Not too bad to fit. Under the scuttle in the centre.
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the hamster

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Re: Heater control problem - only 1 speed
« Reply #6 on: 16 April 2007, 17:49:47 »
thanks guys, guess i'd better put my hand in my pocket and get one. Bit pricey tho, ouch!
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Bo Bo

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Re: Heater control problem - only 1 speed
« Reply #7 on: 16 April 2007, 17:55:36 »
Saw a guy pay £38 for one of those in Vx last week....
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paulmollie

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Re: Heater control problem - only 1 speed
« Reply #8 on: 16 April 2007, 19:34:08 »
same problem on my 96 2.0l cdx it's buried under the dash next to the blower motor vx want £55 i'm off down the scrappy.by the way it's a bitch to get out.
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TheBoy

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Re: Heater control problem - only 1 speed
« Reply #9 on: 16 April 2007, 20:06:02 »
Quote
Wow reminds me of the rovers - heater resistors always blow on them
Tell me about it. She needs another  >:(.  Where is it on a 25, and will a 200 one fit (lots of 200s in our scrappy)
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the hamster

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Re: Heater control problem - only 1 speed
« Reply #10 on: 17 April 2007, 07:25:34 »
so do I attack this from under the bonnet or through the dash?
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the hamster

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Re: Heater control problem - only 1 speed
« Reply #11 on: 17 April 2007, 15:32:50 »
Went to try and get one from a scrappy today but could I get to it? Not a chance.

It would help if I knew exactly what I was looking for and where but I thought if I could find the blower fan it would be a start.

I completely stripped off the bolt on bits on the dash of a mk3 astra and still couldnt see anything. Had a look under the bonnet and there wasnt any sign there either.

Can someone point me in the right direction?
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Marks DTM Calib

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Re: Heater control problem - only 1 speed
« Reply #12 on: 17 April 2007, 15:34:39 »
Its under the bonnet on an Astra, below the pastic scuttle cover at the back of the engine bay....its behind the dash on an Omega (hence the confusion)
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Markie

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Re: Heater control problem - only 1 speed
« Reply #13 on: 17 April 2007, 16:06:20 »
Quote
Quote
Wow reminds me of the rovers - heater resistors always blow on them
Tell me about it. She needs another  >:(.  Where is it on a 25, and will a 200 one fit (lots of 200s in our scrappy)

Remove glovebox and you should see a plug with two screws either side behind where glovebox was.

Unscrew the screws - release the plug and the resistor comes out mounted on the plastic part. Took one out yesterday morning and flogged it - if you had said before hand....

Should be the same part.....same heater etc.
« Last Edit: 17 April 2007, 16:07:03 by Markiec »
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the hamster

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Re: Heater control problem - only 1 speed
« Reply #14 on: 17 April 2007, 16:11:36 »
Sorry for being a thiko Marks DTM but is the scuttle cover the bit between the windscreen and engine bay that water drains through?

I couldnt see another plastic cover at the back on the astra I looked at.

ta mate
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