Start by checking to make sure that the a/c condensor and radiator is not full off debris. If the condensor and radiator were full of debris it will limit the air flow from the engine cooling fan which in tern will cause a high discharge pressure on the discharge on the a/c causing poor or no cooling at idle and could also cause vehicle to overheat. Check and make sure that the cooling fan as well as the condensor fan are coming on together when the a/c is turned on if equipped with 2 fans.
SOURCE: 2006 chvy impala when idling dont blow hot air
1
Inspect
Cooling System Mix
Coolant level low or flow is restricted.
2
Inspect
Thermostat
Thermostat stuck closed
3
Inspect
Heater Control Valve
Leaking or defective heater control valve.
here something to help u
Here to help Shaun
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