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1999 DeVille Heater-A/C will not go in "Auto" mode. Stays in "ECON"

1430 Views 3 Replies 4 Participants Last post by  basscatt, 
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1999 DeVille Heater-A/C will not go in "Auto" mode. Stays in "ECON"

I noticed that my HVAC system will not switch into the "Auto" mode (stays in the "ECON" setting) on heat or A/C. I thought I saw a message on the dash message thing that the A/C refrigerant was low but it has not come back on and it is still in ECON. If I run the front defrosters the ECON will go off.

Thanks for any input.
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