Buick - Lesabre :: 1996 - HVAC Fan Will Not Shut Off
May 19, 2013
My son's car overheated yesterday due to a sudden crack in the radiator. He had it towed to me. There was no evidence of a blown head gasket or cracked block, so I replaced the radiator. Since the battery was dead, I put the charger on it. When I did that, the heater/AC fan began to blow. The only way I could get it to stop was to disconnect the battery. Even the ignition switch had no bearing on the fan.
I do not know if the overheating and this problem are related. It may be just a coincidence, but it is odd.
This car has a slide to regulate the blower speed. It is not one of those "Select a temp" automatic ones. It will blow cold air out the AC vents when AC is selected, but when the OFF button is selected ambient air goes to the DEFROST vents.
I suspect a relay is stuck, but what relay, and where is it located?
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I have an old 98 Lesabre, and it runs and drives great. When I first got it I had to do the Vacuum line mod on the programmer to get the HVAC to blow out the face vents. That was the best $1.60 and 30 min I spent on a car
That mod still works and was done about 1.5 years ago, the ENTIRE time i have owned the car the temp blinks when I start the car, but the HVAC has always worked fine so I paid no attention to it. That is until 3 weeks ago when I had to replace my intake manifold. I disconnected the battery without turning the system to "off". I have been doing a bunch of reading online, and it seems I may have thrown the system's sync off by doing this.
Right now my problem is this, colder air coming from the pass side then the driver’s side. When I start the car it will seem synched for a few seconds, then it will start blinking and both vents will go FULL COLD, eventually it brings the temp back up the d-side gets hotter than the p-side. I have done the following:
- gone through AT LEAST 50 on/off cycles
- Removed the 9c fuse to try to reset
- Pulled down the glove box door and watched both the upper and lower blend doors go through there whole range of movement (which they do)
- Tried to re-sync by pushing the temp full hot, then full cold a few times in a row.
Besides getting this scanned by a tech 2, which is my last resort, is there anything else I can do?
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1996 Buick Le Sabre. About 1 time in 10, the car will not start. The starter is fine; seems to get no gas. Took it to garage for diagnosis. They could find NO problem: but replaced plugs and wires anyhow. Car still refuses to start -- just about 1 time in 10. It seems to have a bigger problem if the car was parked going UPHILL. This is not always the case. Is it likely to be the fuel pump? Is there no way to check this without simply replacing the fuel pump?
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I have a 1995 Buick Lesabre. The car jerks while I am driving or when idle as if it wants to shut off. Sometimes it jerks and then the check engine light comes on. When I described the problem to my mechanic he said that it might have been the fuel filter but then he said it might be an electrical problem. I would like to start with the fuel filter to see if that would work but I am not a mechanic nor am I an expert on cars nor do I want to spend tons of money on such an old car.
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In Oct. my wife took the car 40 miles from home, lost the brakes, and limped into a gas station. The guy there gave her a bottle of brake fluid and some stop leak. He suggested equal amounts of both and limp back home. She drove back and went to the machanic in town. He wanted $365 to replace all of the brake lines. He said there may be brake pressure problems and he will address them later. Recently I loaned my son the car so that he could deliver newspapers.
After 2 weeks we needed new front brakes. I had brake pressure problems. If the brake pedal did not feel spongy then the brakes felt inconsistent-sometimes high and sometimes down to the floor. There was a sticky passenger front caliper that was replaced. The brakes were bleed and are still spongy and inconsistent. I noticed that the reservoir cap is not good. Could the cap be the cause of the sponginess? There are no leaks around the master cylinder and there are no leaks. Should I replace the master cylinder? 1996 Buick LeSabre 3.8L....
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I have a 1990 buick lesabre motor is a 3800 and it runs fine until the motor warms up and then when i shut it off it won't restart for about an hour after i shut it off. It's not over heating it has a new fuel pump.
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1996 Buick LeSabre 3.8L... Under the pcv valve housing is a short plastic 90 deg. elbow, about 3/4inch wide. The elbow looks like it comes from the upper plenum and goes into a metal housing behind the belt tensioner. This elbow leaks from behind the belt tensioner side. My question: what is this elbow called? How do I fix it?
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I have a 1996 Buick Le Sabre. There is a bad water leak onto the passenger side back floorboard. I have taken it to the dealer and two repair shops. They are stumped. A hard Florida rain can get 2 inches of water on the floor. Tried re-gluing the rubber seal. That did not work.
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The problem began with the battery going down slowly while the car sat. Then the blower motor wouldn't shut off, even with the key turned off. With the blower motor disconnected, the battery no longer discharges. I bought and installed a (used) climate control panel but the problem persists. I'm not sure where to go from here.
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The water was not actually getting into the HVAC itself, but getting past the air inlet assembly from under the leaf screen directly into the firewall area. I will try a gasket maker that comes in rolls that I can press into place. there is no room for tools there.
Everywhere around the heater and AC module is dry. The foam on the inside firewall immediately under the air inlet assembly is soaked, yet the inside of the assembly is bone dry. I removed the entire to diagnose the leak. A light rain was enough to fill the back foot well with an inch of water.
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I have recently noticed that my car will stall out when I get up to about 20 mph. My car starts fine, no check engine light on. I has a tendency to just die in the middle of the road at times too. I have changed the spark plugs, spark plug wires, and a new fuel filter. Do I need to change the mass air flow sensor? Or the crank position sensor? I have no problems starting the car either. Runs good when it runs.
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Where is the relay box for turn and hazard signals in 98 Buick LeSabre custom? my hazards ans signals don't work switched fuses but didn't work. Where the box is I've never owned a Buick til now. there isn't one under the hood just the main on the driver's side.
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2005Accent. First question: Just replaced blower assembly last week and worked normally. Now the blower operates even with the car off and the no keys in the ignition. The fan speed selector still switches between all speeds whether it's running or not, so it doesn't seem to be the resistor.
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I have a 2000 Buick Regal LS. This problem used to be intermittent but has gotten to the point that I never see a "normal" operating state from my HVAC controller unit, so I need to get it fixed. The problem is that when I turn my car on the controller comes up completely blank except the 4 red lights on the passenger side climate control. The heater then (at the same time) turn on FULL BLAST and is stuck in the 90 degree setting (hottest possible). I got to the point that I pulled the high fan fuse just so I didn't die of overheating...
Today I tried to replace the actual controller unit with a refurbished unit I bought off of ebay. Unfortunately, I had the same result with the new controller...No display at all, but all red lights light on the passenger side climate control. My thought is that the issue is much deeper than a vacuum line (although I haven't checked them yet) or even the controller unit. I've checked all the related fuses and they all seem to be fine. Could this be a computer issue? If so what is the fix?
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1996 buick lesabre custom 3800. The car stalls from time to time, and the fuel pump, power windows, power seats, and power mirrors all stop working. Most people who have had this problem cleaned the ground bus on the drivers side under the carpet. I have done this, and the car has not stalled yet, but I haven't driven it far because I have noticed the fuel pump relay and power windows relay are getting extremely hot to the touch after 5 minutes or so of driving. Why these relays are getting so hot? I cannot afford to keep getting the car towed home.
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My 2001 Buick Lesabre has always shown to run exactly normal on the temperature dash unit until recently. I checked my coolant level and it was a bit low, so I added. After I filled the radiator I have noticed a coolant leak spot on my driveway, after I drive it now. I have removed the gravel shield and have tried to pin point exactly where the leak is coming from, but cannot. Now, each time I park, after driving it, I put a clean piece of cardboard under it to try to see exactly what area the leak is coming from. Last night I put the car on ramps and crawled under to discover that the leak is located just above the oil filter and is actually dripping from the oil filter, but I still cannot see the exact location of the leak.Actually the leak does not appear until about an hour after I park the car, so it sounds like something is contracting after the engine has cooled off, but what? The leak has seemed to be getting worse each time I drive the car. How can I determine exactly where the leak is coming from without just changing a bunch of parts.
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I currently have no brake fluid in my car because it keeps leaking out (leaks while actively being used). The leak is between the power brake booster and the brake master cylinder... Is there any type of gasket I can get to better fill the gap between the two pieces of metal? Is there some way to tell which of the two pieces is creating the leak to narrow down which to purchase?
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My car would not start yesterday, and I realized the fuel pump was not running. So I bought a new fuel pump today and put it on, the car still won't start, the fuel pump still does not run and I have been told to check the relay. I cannot find the relay for this car.
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I have a 1995 buick Lasbre and my engine light is on my car would cut off every once and a while. but when it does it cranks right back up like its a sortage in the wires people say it is an electrical problem i thought it was my crank sensor but my car has never had a problem cranking up it sounds wonderful when it cranks up so whats my problem....
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My '98 Buick's AC works well when I take it to a mechanic. But when I leave after they say, 'it seems fine now,' a few miles later the cold air starts blowing through the defroster vents, still nice and cold. Then it comes back down to the dash and then goes back up to the defrost. But sometimes it stops blowing altogether, it doesn't blow anywhere! Nothing, not even warm air. And then later everything is fine again, until it happens all over again and I take it to another shop when I hear 'it seems fine now.'.
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I have been to a few different repair shops for my 2000 Buick Le Sabre shimmy problem with no luck. I have a really bad shimmy, while accelerating between 45 and 50 mph, and it seems worse on an upgrade. Past 50 mph, it smooths out. Over the past several months, mechanics have checked the balance of my tires and rotated them, done front end alignment, rear alignment, replaced the right lower control arm, the right sway bar link and the right wheel hub. Still no luck, so it came down to the determination that it must be a bad tire. Now I have 4 new tires (it was soon time to get them anyway), and I still have the shimmy. What else can we look for? My local mechanics seems stumped. I have not taken it to a Buick dealership, however...
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