Does your car have electronic climate control? I had a similar problem four years ago on a "96 Bonneville with climate control. The sensor on the Temp Mode" door went bad on it. On a cold start the interior only recieved a little heat at any time. On a warm re-start the heater would blow good hot air for less than a minute and then go back to only a little heat again.
The "Temp Mode" door directs air through the heater core or by-passes the air around the heater. If the sensor on the door is bad the computer sends the door actuator to a default position half way between either extreme, and you olny get a little heat.
At that time the replacement actuator and sensor part #16141822 was about $70. Unfortunatly the dashboard had to be removed to replace it. My local garage found the problem but didn"t want to mess with the dashboard.
The local GM dealer replaced it and charged 4 hours of labor.
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Today's Featured Article - Fire in the Field A hay fire is no laughing matter-well, maybe one was! And a good life-lesson, too. Following World War II many farm boys returned home both older and wiser. One such man was my employer the summer I was sixteen. He was a farmer by birth and a farmer by choice, and like many returning soldiers, he was our silent hero: without medals or decorations, but with a certain ability to survive. It was on his farm that I learned to use the combination hand clutch and brake on a John D
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