nonstop radiator fan
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YoungatHeart
Joined: Jun 2008
Posts: 72
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From: NYC
nonstop radiator fan
HELP........just came back from some errands. shut off the engine and 10 seconds later driver side radiator fan kicks in and keeps running...don't know how to stop it...started car OK but when I shut it the fan kicks in...afraid it will kill battery...need some suggestions quick...will search for answer while someone might answer this,,,thanx
Thread Starter
YoungatHeart
Joined: Jun 2008
Posts: 72
Likes: 0
From: NYC
thanx for the response AM...went down to garage to check..had engine running afraid to drain battery...shut engine and fan stopped...just never did that before...will check coolant level when cool, but something caused it, don't you think?
Team Owner
Joined: Sep 2006
Posts: 33,535
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a few minutes is ok- its temp controlled by a sensor on radiator bottem
When you shut the engine off, there is an instant rise in temp- the fan comes on to take care of
If you are talking 10-15 minutes- then you need to look at the sendor unit- passenger side lower corner of radiator- cheap AND simple to replace, and seems to be a lot of them dieing recently
Fan that runs more than 15 minutes will kill the battery and does indicate some type of problem
Check the radiator cap seal carefully
When you shut the engine off, there is an instant rise in temp- the fan comes on to take care of
If you are talking 10-15 minutes- then you need to look at the sendor unit- passenger side lower corner of radiator- cheap AND simple to replace, and seems to be a lot of them dieing recently
Fan that runs more than 15 minutes will kill the battery and does indicate some type of problem
Check the radiator cap seal carefully
Thread Starter
YoungatHeart
Joined: Jun 2008
Posts: 72
Likes: 0
From: NYC
a few minutes is ok- its temp controlled by a sensor on radiator bottem
When you shut the engine off, there is an instant rise in temp- the fan comes on to take care of
If you are talking 10-15 minutes- then you need to look at the sendor unit- passenger side lower corner of radiator- cheap AND simple to replace, and seems to be a lot of them dieing recently
Fan that runs more than 15 minutes will kill the battery and does indicate some type of problem
Check the radiator cap seal carefully
When you shut the engine off, there is an instant rise in temp- the fan comes on to take care of
If you are talking 10-15 minutes- then you need to look at the sendor unit- passenger side lower corner of radiator- cheap AND simple to replace, and seems to be a lot of them dieing recently
Fan that runs more than 15 minutes will kill the battery and does indicate some type of problem
Check the radiator cap seal carefully
Team Owner
Joined: Sep 2006
Posts: 33,535
Likes: 1,142
If the reserve tank was empty - the engine sucked the coolant from it- likely there is a leak in the system-
AND
check the resivor cap- IS the rubber tube attached to the inside of the cap, and sits down in the coolant with the cap on normal?
Without that tube in place, the recovery system does not work- that may be all thats wrong
Inspect the cap seal, look on the radiator edges for coolant showing at seam break, or in front of rad-look for rock hit
Parts store will loan you (refundable deposit) the pressure tool for testing the cap and the system
You pump up the pressure to simulate running conditions, and the leak shows as coolant spray from a pinhole
Check that rubber tube inside the res cap- mine came off when changing coolant... is how I know about it~
AND
check the resivor cap- IS the rubber tube attached to the inside of the cap, and sits down in the coolant with the cap on normal?
Without that tube in place, the recovery system does not work- that may be all thats wrong
Inspect the cap seal, look on the radiator edges for coolant showing at seam break, or in front of rad-look for rock hit
Parts store will loan you (refundable deposit) the pressure tool for testing the cap and the system
You pump up the pressure to simulate running conditions, and the leak shows as coolant spray from a pinhole
Check that rubber tube inside the res cap- mine came off when changing coolant... is how I know about it~
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Team Owner
Joined: Sep 2006
Posts: 33,535
Likes: 1,142
NOTE Dont FILL the res bottle past the full COLD mark
The hot fluid at shutdown expands and gets pushed into the res bottle- when engine cools the action reverses and coolant returns to the radiator.
There has to be correct storage capacity for the expected rise- ~
The hot fluid at shutdown expands and gets pushed into the res bottle- when engine cools the action reverses and coolant returns to the radiator.
There has to be correct storage capacity for the expected rise- ~
Team Owner
Joined: Sep 2006
Posts: 33,535
Likes: 1,142
kapt
check your owner book for the burping procedure- its a series of specific revs and times and operations of the fan and the cap on or off and....took 20 minutes in the driveway on my 01TL, but it was done right and done once!
Make sure the heater is on full hot temp select so its ~mini-radiator~ is open-
'heater core' if you want technical name-
the heater core is working part of the flow of coolant when open and gives up its air bubbles in the process
check your owner book for the burping procedure- its a series of specific revs and times and operations of the fan and the cap on or off and....took 20 minutes in the driveway on my 01TL, but it was done right and done once!
Make sure the heater is on full hot temp select so its ~mini-radiator~ is open-
'heater core' if you want technical name-
the heater core is working part of the flow of coolant when open and gives up its air bubbles in the process
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