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2006 2500HD Duramax A/C Trouble

Old June 25th, 2016, 5:03 PM
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Default 2006 2500HD Duramax A/C Trouble

The compressor clutch isn't engaged. Checked fuse,OK. Changed relay with no change. No voltage to relay switch terminal. What is the next items to check?
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Old June 25th, 2016, 6:56 PM
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If charge is low compressor won't engage to protect it. Just had to have our '05 Sub evaporator core changed. 1st symptom was no compressor.
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Old June 25th, 2016, 8:08 PM
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Make sure you've got enough freon in the system.
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Old June 26th, 2016, 11:48 PM
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Originally Posted by JHH452 View Post
No voltage to relay switch terminal.


the ac relay with key on should have power at 2 pins, open circuit on one pin and 1 should have grd.
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