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Radiator fan runs continuously

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2001 - 2007 V70
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BryonTheCanadian
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BryonTheCanadian

Radiator fan runs continuously

Post by BryonTheCanadian » Tue Apr 23, 2019 11:23 am

Hi team my rad fan is now running on high from the second i switch on the car cold... If read it could be a defective part on the fan unit or high pressure switch on AC condenser... My Ac does not seem to be working so could be that.. Is there an easy way to disable the high pressure sensor to remove it from the equation? to see if its the Fan electronics... or other ideas B



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RickHaleParker
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Re: Radiator fan runs continuously

Post by RickHaleParker » Tue Apr 23, 2019 11:40 am

BryonTheCanadian wrote:
Tue Apr 23, 2019 11:23 am
Is there an easy way to disable the high pressure sensor to remove it from the equation?
1. Disconnect the wire to the A/C clutch so that it cannot be engaged.
2. Pull the wires on the A/C pressure switch and put a jumper across the two wires. 1/2 of a paper clip makes a good jumper.
3. Tape it so it does not get shorted.

If the fan runs correctly you found the source of the problem and can run this way until you get the A/C fixed.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
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cbova
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cbova

Re: Radiator fan runs continuously

Post by cbova » Sun Apr 28, 2019 6:35 pm

Did you find a solution to this? Mine started doing the exact same thin last week. I'll start a new thread with what I've checked so far so not to hijack.



BryonTheCanadian
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BryonTheCanadian

Re: Radiator fan runs continuously

Post by BryonTheCanadian » Mon Apr 29, 2019 9:08 am

No have not checked much out. seems it could be 1 of two things either Fan switch or high pressure sensor on AC



BryonTheCanadian
Posts: 22
Joined: Wed Jan 09, 2019 1:47 pm
Year and Model: 2006 XC70
Location: ON
Has thanked: 4 times
Been thanked: 2 times
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BryonTheCanadian

Re: Radiator fan runs continuously

Post by BryonTheCanadian » Mon Apr 29, 2019 9:09 am

RickHaleParker wrote:
Tue Apr 23, 2019 11:40 am
BryonTheCanadian wrote:
Tue Apr 23, 2019 11:23 am
Is there an easy way to disable the high pressure sensor to remove it from the equation?
1. Disconnect the wire to the A/C clutch so that it cannot be engaged.
2. Pull the wires on the A/C pressure switch and put a jumper across the two wires. 1/2 of a paper clip makes a good jumper.
3. Tape it so it does not get shorted.

If the fan runs correctly you found the source of the problem and can run this way until you get the A/C fixed.
Thanks Rick where would the AC pressure switch be located... Thanx



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