it does this all the time
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2007 Chevrolet Colorado Question: blower motor only works on 4
repl blower motor resistor,when they go bad they default to high and thats what you have. they cost approx 15.00 at the dealer and are easy to repl. its located under the glove box area
Answer #2aguyfromPanamaCity July 29, 2013, 20:10Rookie
Mine did the same. I replaced only the blower control & it worked for about 2 weeks then stopped working. Had to replace the blower control & the resistor. Been about a year & still working.