Scorpio AC fan always on

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john keefe
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Scorpio AC fan always on

Post by john keefe » Wed Apr 11, 2018 9:37 pm

TIA... so recently, the loud AC fan is operating all the time, regardless of engine temp. Its mild Winter here, so outside temp is not a factor.

At first, I thought it was the main fan clutching in on startup, but its definitely the AC fan. Cycling the climate controls does nothing, though AC will kick in properly. Short to ground somewhere? Anybody else w/ experience with this issue?

brokencase
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Re: Scorpio AC fan always on

Post by brokencase » Wed Apr 11, 2018 10:27 pm

Either your condenser cooling fan relay is shorted or the condenser cooling fan temperature switch is stuck on.
Or (less likely) there may be a short somewhere in the harness to these items.
The relay is with the rest of the fuses/relay box.
The cooling switch is on the RH side of the radiator.

john keefe
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Re: Scorpio AC fan always on

Post by john keefe » Sat Apr 14, 2018 12:25 pm

Thanks! I would think the temp switch is the most likely culprit, but assumed it only comes on automatically whenever AC is engaged? I'll look at my schematics.

Ed Lijewski
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Re: Scorpio AC fan always on

Post by Ed Lijewski » Sat Apr 14, 2018 12:44 pm

That is the coolant fan temp switch. ( In the radiator whereas the XRs is in the lower intake manifold.) Only switches on when/if coolant temp exceeds set level, and when/if a/c pressure exceeds set level.

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john keefe
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Re: Scorpio AC fan always on

Post by john keefe » Sat Apr 14, 2018 12:53 pm

So, you guys think that engine TCS is kaput?

Ed Lijewski
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Re: Scorpio AC fan always on

Post by Ed Lijewski » Sat Apr 14, 2018 3:38 pm

Disconnect the harness from it and observe. Test the relay.

YMMV
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merkurdriver
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Re: Scorpio AC fan always on

Post by merkurdriver » Sun Apr 22, 2018 12:54 am

brokencase wrote:
Wed Apr 11, 2018 10:27 pm
Either your condenser cooling fan relay is shorted or the condenser cooling fan temperature switch is stuck on.
( x 2 )
On the relay. I've even seen the electric fan running with the car off / key out / doors locked.

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