Heater controls on 2000 Chevrolet S10

Why would I not be able to get hot air from the heater when engine is at normal operating temperature?

by in Denver, CO on November 22, 2010
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3 answers 1 comment
ANSWER by , November 23, 2010
you could have a defective or malfunctioning temperature blend door. Its job is to direct the air over the heater core, so it gets warmed up!
COMMENT by , November 24, 2010
Thanks for the response. I was thinking maybe the control in the dash. If one were to check the blend door you mentioned, where would one find it, firewall or under dash? I know on my 2000 Silverado, the entire dash had to come out to replace my heater core!
ANSWER by , November 24, 2010
thermostat
ANSWER by , January 17, 2011
Sounds like your heater core is air locked, and it just needs to be back flushed.