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Topic: Fans not working (Read 486 times) |
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wolfblood
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Fans not working
« on: Nov 15th, 2010, 1:46pm » |
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Afternoon Everyone.
Well I had a days worth of joy last week as the scorpio (24V) passed her MOT retest with just a bit of welding needed.
Next day had quite a long drive and when pulled up the expansion tank pressure release was pouring out coolant. This was shortly after I had had driven over a pothole covered in a puddle which made the car lurch quite a buit if it is any help.
Upon inspection I noticed the cooling fans were not on even though the aircon was on so I assume the engine was overheating and therefore over pressuring the system, especially as I had added a bit too much antifreeze the previous week and the tank was well up to the full mark beforehand. I have checked & reseated the fuses but since then I have noticed the fans come on intermittent
Not on when aircon is switched on and engine cold, which I thought they had to be, but does kick in when engine warm although only slow.
Unfortunately with the dark nights I have not had a chance to inspect fully.
Any htoughts appreciated (I will get round to writing up my adventures with the cooling system one day).
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Tompion
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1997 2.3 Ultima estate.
Posts: 2918
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Re: Fans not working
« Reply #1 on: Nov 15th, 2010, 3:04pm » |
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The compressor cycles on & off. Check the aircon clutch is engaged. The fans come on when the clutch engages (you’ll see the centre of the compressor pulley turning when it’s engaged) – so you can’t just use the aircon light as a guide as to whether the fans should be on. When the clutch disengages it takes about 10 secs for the fans to go off.
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Snoopy
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Very old.BAD tempered and missing friends.
Posts: 6278
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Re: Fans not working
« Reply #2 on: Nov 16th, 2010, 8:08am » |
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Also remember that if the air flow switch is directed to SCREEN the A/C is ON by default.
so the fans will operate.
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