Question about 1991 Buick LeSabre

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Ihave no heat on my 1991 buick lesabre

I already changed the thermostat and it still doesnt work.

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A device called the "blend door" may be inoperable; this is located in the heater exchange box on the firewall...accordianman

Posted on Dec 15, 2008


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1 Answer

Heater not heating very good

If the coolant level is full and the water pump is circulating the coolant through the system adequately then the most like cause is the heater core has become clogged. The heater core can be flushed or replaced to fix the issue.

Feb 23, 2015 | 2000 Buick LeSabre

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I just hang thermostat in 1994 buick lesabre and still get no heat what can be wrong

Either the controller is not moving the valve or your heater core is clogged and needs to be back flushed.

Sep 22, 2014 | 1994 Buick LeSabre

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Will the motor from a 1991 buick lesabre drop into a 1991 buick skylark with no problems

You will run into an issue from the VATS antitheft system of the LeSabre, not working with the key/ignition of the Skylark

Security Help

Dec 31, 2013 | 1991 Buick LeSabre

1 Answer

My 1991 buick lesabre this morning showed the coolant temperature light on the dashboard when i opened my hood steam was visibly coming off the engine block...i waited 30 minutes then opened the radiator...

It's either the radiator is blocked and needs to be flushed or changed,or the thermostat (the temperature regulator) is blocked and needs to be changed.

Aug 26, 2010 | 1991 Buick LeSabre

1 Answer

Have a starting problem with my 1991 Buick Lesabre. Wont start alot of times after car has been driven. What should I check?

It likely is a bad starter.
When running the start is drawing heat from the engine and needs to cool off before it wants to work again
( much like me on a hot summer day)
If the starter has been replaced before many of the cars in this era had heat shields that may have been left off

Mar 08, 2010 | 1991 Buick LeSabre

1 Answer

1997 buick lesabre HEATER PROBLEMS The fan works fine but it doesn;t heat up. Cold air is always blowing out of the vents

This could be several things. First I would check that the thermostat is not stuck open. This will condition will make the car run cold when it is cold outside.

If this is not the case........and I'm assuming you've already checked that the antifreeze is full, make sure that the heater valve is working. If it is frozen in place then it won't move and won't allow the warm water to circulate through the heater core.

I'm basing my answers on a standard Lesabre. Yours may not have the standard climate control.

Oct 13, 2009 | 1997 Buick LeSabre

1 Answer

2000 LeSabre low milage (<75K) everyting perfect except - no heat. where do I start?

I would start by changing the thermostat. If you do your own work, here is the link to a step by step guide that will assist you

Oct 01, 2009 | 2000 Buick LeSabre

2 Answers

My 1990 Buick Lesabre heater does not work all that good ! Takes a long time before I feel the heat ... really long time when its cold outside ! Is it the thermostat ?? Is it easy to replace ? What else...

Most likely the thermostat sticking...
The thermostat could also be missing!
That would create some of the symptom you describe.

Not too hard to replace. It is at the end of the large radiator hose where it connects to the engine.
1. Drain radiator
2. Undo the two bolts that hold down the thermostat housing
3. remove thermostat and remove all old gasket and gasket sealant residue on the engine and housing
4. replace thermostat in the correct orientation (pointy side UP) with the new gasket and sealant
5. Tighten down housing and re-fill the radiator.

It could also be a clogged heater core. It may only be circulating enough heated water to work sometimes and the water is returning to the radiator via the "bypass" hone.

Hope this helps!

Sep 11, 2009 | Buick LeSabre Cars & Trucks

2 Answers

My 1991 dodge dakota doesnt have working heat

I would say that you need a new thermostat, It is really cheap to fix that and it is also easy, I would start with that.

Jan 27, 2009 | 1991 Dodge Dakota

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