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Tiny
PAULTAYLOR122878
  • MEMBER
  • 2000 BUICK LESABRE
2000 buick lesabre, new thermostat and water pump, over heats and fan wont come on?
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Saturday, April 2nd, 2011 AT 9:24 PM

8 Replies

Tiny
WRENCHTECH
  • EXPERT
How hot is it getting? Is it going all the way into the red? How did the problem start?
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Saturday, April 2nd, 2011 AT 10:37 PM
Tiny
PAULTAYLOR12281978
  • MEMBER
There Is no red on it its digital I just went to the store and it stopped workin. Worked fine all day til igot home from work and it just quit blowin hot air. I was hittin like 214 219 and I know that's to hot. All I know is now the fans are not kickin on. So please let me know. Me I think either the vent actuator and the coolant temp sensor but heck. I quit workin on cars years ago.
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Sunday, April 3rd, 2011 AT 1:43 AM
Tiny
WRENCHTECH
  • EXPERT
No, I'm afraid you're wrong about that. That fan is programmed to come on at 223degrees so 219 is not too hot and completely normal.
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Sunday, April 3rd, 2011 AT 1:50 AM
Tiny
PAULTAYLOR12281978
  • MEMBER
Ok then here is this I got the car feb and it had a bad thermostat so I changed it an the heat worked awsome. The temp at max only hit 195 196 and then all of a sudden the heat quits workin and no the temp is up that high.
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Sunday, April 3rd, 2011 AT 1:55 AM
Tiny
WRENCHTECH
  • EXPERT
I just gave you the documentation on the engine temp. If you have heater problems, that could be something entirely different.

Here's how you check that out.

With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If not too hot to hold, then you have to look at the actual engine temp and if that is up, if it is, then your looking at a restricted heater core.
If you find that they are both too hot to hold, then the heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
If they are both not too hot to hold on to, then you either have a restricted heater core or the system is not completely full and getting air pockets for some reason.
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Sunday, April 3rd, 2011 AT 1:58 AM
Tiny
PAULTAYLOR12281978
  • MEMBER
Ok well I did grab the heater core hose they also was hot same temp as engine. The only ting that I have not done was flushed the system yet to se if it is clog.
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Sunday, April 3rd, 2011 AT 2:25 AM
Tiny
WRENCHTECH
  • EXPERT
If both hoses were host, your cooling system is fine so forget the flush. You have a problem with the blend door
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Sunday, April 3rd, 2011 AT 2:28 AM
Tiny
PAULTAYLOR12281978
  • MEMBER
And those are located behind the glove box right
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Sunday, April 3rd, 2011 AT 2:52 AM

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