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Sanden 4440 to replace GM HT6... missing switch?

JP99Denali on Mon January 05, 2009 7:24 PM User is offlineView users profile

Year: 1999
Make: GMC
Model: Yukon Denali
Engine Size: 5.7
Country of Origin: United States

Hi... I recently acquired a Sanden 4440 AC compressor to replace my Yukon's leaky HT6.

The compressor was a perfect fit to bolt on (with the supplied spacers), and the clutch wire connector fit well.
My question: On the back of the oem Ac compressor, there is a round, wire connector with 2 small pins. The Sanden unit
has no such connector. Can I leave this wire unhooked? or do I need to transfer this "sensor?" to the sanden unit.

The only instructions that came w/ the Sanden was info on using the mounting spacer, and a longer serpentine belt.

Please help!~

Chick on Mon January 05, 2009 8:06 PM User is offlineView users profile

There should be a blank/plug held in with a snap ring where the switch would go, remove the plug and put your switch in the hole, be sure to use the snap ring to hold it in..Hope this helps..

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

TRB on Mon January 05, 2009 8:08 PM User is offlineView users profile

Is there a removable plug on the back of the Sanden?

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JACK ADAMS on Tue January 06, 2009 10:29 AM User is offline

Follow Chick’s leads and you will be fine, just make sure the snap ring seats in all the way or it will pop out do to pressure. Hope this helps and good luck!!

GM Tech on Tue January 06, 2009 12:53 PM User is offline

That switch has to be there-- the compressor will not run without it-- it is a normally closed high pressure cut-out switch- it opens at 427 psi -closes at or below 250 psi.

Transfer it into the new pump like others have mentioned.

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

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