Question about 1999 Buick LeSabre

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Heater/Air Conditioner fuse keeps shorting

I have to continuously replace the heater fuse for my 99 LeSabre. I'm thinking it could possibly be the wrong wattage that makes it short. I've been using a 20. Is this correct? And if so, something must be wrong for it to do that. Any ideas? Thanx. -Melissa. Pittsburgh, Pa.

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  • Buick Expert
  • 179 Answers

Hi Melisa
Under hood fuse block FUSE - A3(A/C)=30 Amp
under dash fuse block FUSE -5(AUTO A/C)=5Amp
-9(MISC/CLSTR)=10Amp
-11(A/C FEEDBACK)=10Amp
-7(MISC ENG)=20Amp
If you tell me the # I will give you more direcyion what's wrong

Posted on Mar 25, 2014

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  • Buick Master
  • 15,557 Answers

20 is a lot and is probably right. Does it blow out when you use defrost or just heat? The reason I ask is because the air conditioner comes on when it is on defrost.

Posted on Mar 25, 2014

Testimonial: "Nothing happens. The light has also gone out, indicating there's no power going to the unit at all."

  • SteelyDanGrrl77
    SteelyDanGrrl77 Mar 25, 2014

    Sorry I put my response in the testimonial section. Nothing happens. There's nothing. This happens probably once every 4 or 5 months.

  • Anonymous Oct 27, 2015

    Mine blows right after I put fuse in and turned car on. Was using 20amp. It was working but then one day it just went out. Think there is a short somewhere.

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Posted on Jan 02, 2017

mrgreenz
  • 962 Answers

SOURCE: 1992 BUICK LESABRE LIMITED, NEED FUSE BOX DIAGRAM

the fuse is in panel with other fuses,however it will say a\c instead of heater. You may want to use a test light to check for voltage at the blower motor plug. To see if current is going to the fuse. Check the other fuses too. since they are linked in parallel to the the acc auto climate .

Posted on Dec 06, 2008

  • 2187 Answers

SOURCE: 2000 Buick LeSabre A/C blows

Depending on the model, normally there is a door at the center of the air duct for the AC. It should be found underneath the dashboard at the center. Normally when the motor of the door is faulty you would not get the correct mix or will not get a constant air temp blowing on the two sides. Have the motor checked out. The other scenario is the thermostat or the temp sensor found near the same location towards the evaporator or the part where you can see the coils if you remove all the cover. Inspect the wiring to that part make sure that there is no exposed wire or loose wire. Either there is an issue with the wiring or the thermostat has gone bad. A bad thermostat would mean no signal to the AC which activates the door to send the correct air temp.

Posted on Apr 13, 2010

bozcro
  • 867 Answers

SOURCE: 2000 Buick LeSabre heater only blows cold

the climate control thermostat is not opening the valve to let the warm coolant in

Posted on Nov 29, 2009

gearhead97
  • 60 Answers

SOURCE: heater not working in my

This sounds like the blend door actuator. This is a little door in the vent box down under the passenger side dash that opens and closes to change the vent temperature from heat to a/c. It is a little motor that opens the door. It tends to stop working due to the elements that it is in. I hope this helps!!! Thanks!!!

Posted on Oct 06, 2010

jturcotte
  • 8140 Answers

SOURCE: 99 Buick LeSabre, Heater/AC blower kicks in and

most likely it's the switch.

Please see my tip at http://www.fixya.com/cars/r6234839-doesn_t_heater_or_air_conditioner_blow . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Posted on Oct 27, 2010

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