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[Greenbay packer]

Was driving along quite happily the other day when the blower in my 1996 2.5 V6 CDX suddenly turned itself on full power - now it is stuck on permanently and I can only turn it of if I pull the fuse.  I've had a quick look on here and fleaBay and have found mention of a radiator fan and heater motor relay (a 40V orange unit, part no.90459640), and a heater blower regulator (part no.90512510 and other numbers) which I'm assuming is the unit also known as a hedgehog.  Is it likely to be one of these units that's causing my problem or would something else do it?  Also, does the car have have both of these units fitted or is it just one or the other on different models/ years?

Lastly, is a faulty blower an MoT issue?  I've got one coming up and have other jobs to do to the car for that so would rather leave the blower until afterwards if possible.

Thanks for any help given.

[less]

First thing to check would be the scuttle drain (passenger side). If blocked, the scuttle cavity fills with water and eventually spills through the pollen filter and into the passenger side footwell, via blower control electrics (including hedgehog).

If this is the cause you may be lucky if you clear the blockage. Impossible to tell until you try.

Good luck

[Greenbay packer]

First thing to check would be the scuttle drain (passenger side). If blocked, the scuttle cavity fills with water and eventually spills through the pollen filter and into the passenger side footwell, via blower control electrics (including hedgehog).

If this is the cause you may be lucky if you clear the blockage. Impossible to tell until you try.

Good luck

The cavity is completely unblocked - I had to unblock it over the winter as there was some water in it (not sure how high the level got before I realised there was a blockage), but the cavity has been completely dry since then and the blower has been working ok.

[TheBoy]

The water that came in in the winter has knackered the speed controller. You need to replace it.

[dbug]

Get a good used one - either an Omega one or one from an Astra G (same part) - new is very expensive

[Greenbay packer]

The water that came in in the winter has knackered the speed controller. You need to replace it.

Thanks - is the speed controller the same thing as a 'hedgehog'?  Also, does anyone know if this is an MOT issue?

[Greenbay packer]

Get a good used one - either an Omega one or one from an Astra G (same part) - new is very expensive

If its the 'hedgehog' thing I need I've seen them advertised on eBay from £22 to £500 for new units - presumably pattern and genuine. 

[Marks DTM Calib]

It is indeed the 'hedgehog'