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Topic: Ventilation fans running on constant maximum (Read 598 times) |
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Geoff_W
Senior Member
98 Ulti2.5tdi Auto
Posts: 1340
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Ventilation fans running on constant maximum
« on: Oct 7th, 2010, 9:18pm » |
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I have my suspicions that I have a HBC problem but both left and right ventilation fans are running flat out when the ignition is on. CC controls do not change things at all.
I have temporarily solved the problem (fans off and not working) by unplugging the left hand connector to the HBC.
I do not remember fans failing in the on position.
Any thoughts?
Geoff
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The winding road goes on and on... or at least it does in Northumberland
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Cosray
Full Member
8th Scorpio, 2nd Cosworth: currently '95
Posts: 569
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Re: Ventilation fans running on constant maximum
« Reply #1 on: Oct 7th, 2010, 10:03pm » |
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Hi Geoff - you've only got one ventilator motor for the CC. With CC you you have two flaps for left and right vents + sensors to control their temp.
Either the fanmotor runs or not or erratically in which case you need a new HBC with a long coling fin.
Behind your radiator you've got two fans each or both controlled by a big relay under the headlight and the EEC-V - are they behaving strangely?
Pls clarify -
Ray
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: Ventilation fans running on constant maximum
« Reply #2 on: Oct 8th, 2010, 4:30pm » |
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Is the ribbon cable at the rear of the control panel securely in ?....If it's not, then that causes the blower to run at full pelt 
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