Heater blows only cool air...even w/ defroster on on Buick LeSabre

Average mileage: 128,128 (63,000–171,960)
5 model years affected: 1993, 1998, 2002, 2003, more2004
15 people reported this problem
7 people shared problem details
2002 Buick LeSabre171,960
Only the cold/cool air comes out of my unit. I have checked the control panel (removed and opened) to ensure the device was moving properly from side to side (cold to hot), it does. I then checked the battery, making sure the reset, from having my mass air flow sensor replaced didn't cause a misread to the electrical system. Today, I find it is the accualtor door. Part $91.06 plus tax, Nash Cheverolt, and $117.00 for labor. I did it myself, it was approximately 10 screws and 30 mins (or so) of laying uncomfortabley on my back.- no jokes, please. Heat works like a champ and the Buick gets to live another day in my garage.
I'll turn up the temp on the dual control to get heat, and/or the defroster to blow warmer air. All I get is cool air that makes for an uncomfortable ride and slower defrost. I did replace the blower motor in the summer, could this have caused the problem by not hooking something up correctly?
2002 Buick LeSabre63,000
Heater blows cold air. Have not found a solution.
2003 Buick LeSabre125,000
Had the same problem. Mechanic flushed out the entire engine and cleaned out the gunk that had built up. Now I have heat after nearly 2 winters without it. Be sure to have them check all hoses and connectors after the flush out; I had a leak within 5 days from 2 elbow parts (plastic) that disintegrated because they had pretty much been held together by the gunk inside.
2002 Buick LeSabre102,500
Defroster only blows cold air with heat set. Took to dealer and flushed cooling system corrected problem.
my car blows out warm and cold air after 20 minute I change the thermostat check the coolant levels would it be the climate control unit are the temperature control unit
heater filed 2yrs ago. No heat and no air. A cold winter and a very sticky summer
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