Question about 2003 Buick LeSabre

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Need to know location of low and high pressure switch on a/c of a 2003 buick lesabre

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Find the ac compressor, follow the hose going to the rear, when you find two wires that's it
Don't touch it unless the system's been evacuated, you'll get a face full of freezing goop and probably ruin the threads, ask a parts house, sometomes the section of hose must be replaced the switch is welded on, most GM's put the switch on the expansion block,that one's usualy not removable the block must be replaced
If you paln to remove it either empty the system, or have a pro do it
THIS IS DANGEROUS BE CAREFUL

Posted on Aug 30, 2009

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That switch can be replaced without loss of refrigerant because there is (or supposed to be) a shrader valve in the dryer.

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There is a low refridgerant pressure switch, and a high refridgerant pressure switch. Either can cut the power to the clutch. You will have to check the pressure in the system to know for sure.
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I have a 1992 Buick Lesabre Limited. The windshield wipers work on high and low but not intermitent also there is no power to the windshield washer pump on the resevoir.


This is the switch itself. Replace the switch and all will be well. If you need instructions, let me know. Happy new year.

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We are trying to find out if my 1997 buick le sabre has an oil pan sensor or oil pressure sensor and where it is located at so that we can change out the oil pan


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Where is the orifice tube on a 98 Buick LeSabre located?


not exactly sure but using info below you can find it.

Remember the flow for the a/c system is :
1. From the compressor a high pressure (HP) gas goes to the condenser in front of the radiator.
2. From the condenser a HP liquid goes to an expansion device (orifice tube or expansion valve)
3. From expansion device the low pressure gas enters the firewall to the evaporator.
4. From evaporator the low pressure liquid/gas mixture goes through the dryer2_bing.gif back to the compressor suction.

There will be about a 1" nut on the low pressure line between the firewall and the compressor. Remove nut and on the male side use a pair of kneedle nose pliers and remove orifice tube. Note orientation of tube.

Replace tube, reassemble, evacuate air from system, recharge with freon.

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It has a low pressure sensor on the low side line. You put freon in first and when there is enough pressure the compressor will come on. Never straight wire it, you might cause more damage.

Jun 14, 2009 | 1997 Buick LeSabre

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