my 2008 impala blows warm to hot air at high idle but wont blow warm air at regular idle tried rplaceing thermastat didnt work?
Check the temp settings on the dash, and is the A/C on? Does the engine sow normal operating temps? It wouldn't be the thermostat. It may be the blower isn't blowing at low speeds enough. The heater door isn't opening all the way? It also may be the heater controls acting up.
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