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2001 Honda Accord Radiator cooling fan is on all the time

Tiny
KALEV001
  • MEMBER
  • 2001 HONDA ACCORD
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 125,000 MILES
The engine is not hot but the radiator cooling fan and AC fan are on all the time. The ac pump is working all the time also and the hoses are white from the haze. What could be the reason?
The car had some repair work done and the fans where removed and installed back again.
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Sunday, September 13th, 2009 AT 11:30 AM

9 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi kalev001,

When the Ac compressor is working, the fans would come on. Seems you hace a problem with the AC compressor circuit. Check the AC compressor relay, if it is stuck in the closed position, the problem would happen.
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Sunday, September 13th, 2009 AT 2:27 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
Are you operating AC? If yes fans will be on whenever AC is on.
Let me know
Thanks for donate
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Sunday, September 13th, 2009 AT 2:28 PM
Tiny
KALEV001
  • MEMBER
  • 5 POSTS
It does not matter if I press AC button inside the car. The AC pump is running all the time. The difference is that then I press the AC on inside the white haze from the hoses under the hood is dissapears.
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Sunday, September 13th, 2009 AT 6:35 PM
Tiny
KALEV001
  • MEMBER
  • 5 POSTS
Could you please tell me where I can find the AC relay?
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Sunday, September 13th, 2009 AT 6:36 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Here is a diagram of the location. Unplug the relay and if compressor stops, swap with condenser or radiator relay and retest.


https://www.2carpros.com/forum/automotive_pictures/192750_FuseHood01AccordFig06_1.jpg




https://www.2carpros.com/forum/automotive_pictures/192750_FuseHood01AccordFig06a_1.jpg

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+2
Monday, September 14th, 2009 AT 8:26 AM
Tiny
KALEV001
  • MEMBER
  • 5 POSTS
I checked relay and it works. Is there anything else I can check?
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Wednesday, September 16th, 2009 AT 11:34 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Did you swap the relays? The fault could be the relay is stuck in the closed position causing the compressor to remain on.
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Wednesday, September 16th, 2009 AT 11:50 AM
Tiny
KALEV001
  • MEMBER
  • 5 POSTS
Yes I did that. Does not help, the AC is on all time still.
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Thursday, September 17th, 2009 AT 10:10 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Bad news. The compressor clutch relay ground control is through the PCM and since relay is not the fault, either the PCM is faulty or the wire from relay to PCM is shorted to ground.

Unplug PCM and Ac clutch relay and test the PCM terminal A17 ( RED wire ) for continuity to ground. If continuity exists, the wire is shorted to ground.

If no continuity exists, the PCM has to be substituted to test.
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Thursday, September 17th, 2009 AT 10:30 AM

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