Fans always running

[ekmlizard]

Hello, new to the forum here. Glad to see my Impala is not the only one doing this. It has been a cold weather issue for me. It has done this for about 2 years, but in the summer it goes away.
Now here is my question. My passanger side cooling fan motor seems to going bad (ratteling and making a horrible squealing sound). What I found interesting is I unplugged this one fan tonight, suddenly the fan on the other side stopped running after the car was shut off.
I know this is a temp fix, but is a good enough temp fix? Must you have both fans running?
Thanks

[josephk300]

The two fans are probably needed for summer driving when it starts to get hot. Not only do they keep the engine operating temp in range at low speeds or idle, but they also cool the A/C condensor for better A/C performance. To do a permanent fix, would suggest replacing the temp sensor and the thermostat with a high quality Gates 195 degree (assuming your cooling system is in good shape, otherwise go for the 180). Also pull the PCM fuse to reset the system, and the excessive fan running issue should be gone. Also suggest replacing the fan or fans based on how bad they are. Search elsewhere in this forum - someone posted that they found a source for replacement fans at a reasonable price.

[ekmlizard]

The car ran fine today, so until I can get it in the shop, it will do. It is just interesting the one fan is running, but does shut off with the car now, and the temp gauge is still not working.
Thanks for your help. I am having a lot of the issues that are talked about on this forum, with the Impala and it is just nice to have some feed back on them.

[Gems]

If you read my other posting here on a related topic (Stuck open thermostat) my problem seems to be solved after replacement of both the ECT sensor and thermostat... I was advised to get a good quality thermostat like AC Delco OEM... As a backup I have a GATES 180 degree t'stat on order...

[sotexfour]

weak alternator.

go to auto zone and get your alternator checked while still on the vehicle.

it will show how many amps the alternator is pushing out.

mine is only pushing out 32 amps. it should be pushing out 105 amps.

replace the alternator and the problems with the gauge and the a/c cooling should go away.

[Gems]

Originally Posted by sotexfour

weak alternator.

go to auto zone and get your alternator checked while still on the vehicle.

it will show how many amps the alternator is pushing out.

mine is only pushing out 32 amps. it should be pushing out 105 amps.

replace the alternator and the problems with the gauge and the a/c cooling should go away.

Huh????? My original post on this problem was over 1 year ago... Problem fixed at that time by replacing a stuck open thermostat and a bad ECT sensor... Cleared the codes and everything has worked perfect for over 1 year now... Clearly not an alternator problem...

[j cAT]

Originally Posted by sotexfour

weak alternator.

go to auto zone and get your alternator checked while still on the vehicle.

it will show how many amps the alternator is pushing out.

mine is only pushing out 32 amps. it should be pushing out 105 amps.

replace the alternator and the problems with the gauge and the a/c cooling should go away.

I find your comments very wrong....all wrong....and this posting is too old and should be locked......alternator output is dependent on load not rating.......so vehicle type and operation of devices/battery condition will determine alternator output..... but a 105amp alternator will not put out 105amps, but a lower value....if you had a dead good battery the most would be 90amps.......out of alt. to charge it with all power equiptment on..

[impal808]

Originally Posted by Gems

My radiator fans are always running and the engine temp. gauge never moves up... After turning the engine off the fans continue running for a couple of minutes and then shut off... I'm thinking the coolant temp. sensor has gone bad??

I just fixed this problem in my impala try disconnecting the negative terminal for a couple hours to reset the computer. Then reconnect it after that it should be all good

[Gems]

I guess people don't look at the date of the original posting... I had this problem over 1 year ago and I resolved the problem over 1 year ago... Please read thru all the replies in this thread...

This thread should be locked....