1997 Buick Lesabre Heater blowing cold air

[quote:31c1734aec="jeffjode"]Heater problem
1997 Buick Lesabre 6 cyl Front Wheel Drive Automatic 100k miles
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Heater has worked fine all winter. Today I replaced the battery, and since then all I get is cold air blowing out the vents. I've read on other sites that this is a result of the indoor/outdoor air gate not closing 100%. Is this probable?[/quote:31c1734aec]
check blend door and its operation
unplug the bcm and plug it back in
or take it fuse out and put it back in

[quote:be3c426738="BMRFIXIT"][quote:be3c426738="jeffjode"]Heater problem
1997 Buick Lesabre 6 cyl Front Wheel Drive Automatic 100k miles
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Heater has worked fine all winter. Today I replaced the battery, and since then all I get is cold air blowing out the vents. I've read on other sites that this is a result of the indoor/outdoor air gate not closing 100%. Is this probable?[/quote:be3c426738]
check blend door and its operation
unplug the bcm and plug it back in
or take it fuse out and put it back in[/quote:be3c426738]

Thanks for the help. Not really sure what the problem was. I was having trouble with the climate control, so I did send it in to get repaired. I reinstalled the climate control, and I was still only getting cold air. So I removed the glove box, and manually shut the blend door. After that, heater worked fine, and so did the operation of the blend door.