1996 buick century car has been over heating think thermosate is bad car got hot and locked up when it cool off i was able 2 drive it but it was making funny noise than stopped

you got an air lock check for bleed screw on the heater hoses

fan 1 and 2 relay, and the 1655 is evap purge solenoid, the fan relays going bad can cause the car to run hot or overheat, check for broken vacuum lines and replace the purge solenoid if needed.

I just replaced a set of cooling fan motors for this problem, and the connectors on the motors were even melted, had to replace connector pigtails as well, th fans also cools the a/c condenser so if the fans quit then your a/c will not be very cool unless your driving and the air flow will aid like a fan would..

The vent is not opening on that side or blockage perhaps.

COULD BE YOUR HEATER CONTROL UNHOOK IT THEN HOOK IT BACK UP AND SEE IF THAT WORKS

This same thing happened to me in my 1996 buick century just a few days ago. I have the same problem with the door locks and the radio resetting to AM too. I also have the problem of the seats not moving. I think it might be the curcuit breaker or a fusible link. I am not a mechanic, but I do have the repair manual and the mechanics book with the wiring diagrams. If you want me to send the wiring diagram I could do that. I hope that helps. Let me know what you find cause I got the same problem.

Yes it can. The car will not get up to operating temperature as fast. It's never good to modify a car from its original factory specifications.

is it HOT or just not as cold. If its HOT, like heated air, there is a door problem, if its just not cool, the a/c refridgerent is low and will need a recharge, most likely the comp is leaking.

Could be a hose..
When you pull into your drive way - when it is hot - shut it off - this is the best time to look for the leaks because after you shut it of the presure builds a bit.. Check the hoses..
Could be the water pump...
ould be a freeze plug gone bad..

Good luck !

Hi,
This sounds normal to me..... Except "runs to hot when idling"

When you're driving about (airflow over rad) all seems fine, but when sat in traffic idling - the fans come on to cool. Is the problem that even with the fans running, temperature still goes up - and fans never turn off again?

Is this the problem?

If it is, then the coolant pump may be badly corroded, not driving efficiently, or the coolant needs flushing and replacing.