I get heat out of the vents until I go to turn the heater up. Then it takes forever to heat the car.

Hi Dave,

The only fuse are for the fans for the vents. If you have no heat coming from vents when you turn the heat to max, there is a problem with the internal heat exchanger (usually located behind the glove box on most cars). Vehicles use heat from the car's cooling system, i.e. the antifreeze from the radiator- to transfer to the passenger compartment. This is why you do not get immediate heat from the vents until your engine is warm. I hope this answers your question.

vent flap shutting off?

I will assume that your engine is full of coolent, and does not overheat. Now if your car takes like forever to heat up, It will be that your thermostat is stuck open, but after a while, you would have heat in your car. If your engine coolent hoses get hot, but your heater hoses do not, remove the heater hoses where they connect to the engine. This is the first place dirt, grime, and corrossion build up, stopping the flow of hot coolent from going through your heater core. (heater hoses stopped up at engine/waterpump connection.) Your heater core may also be stopped up if there is alot of corrossion present.

The thermostat is located directly under where your upper radiator hose connects to the engine.

Back flush out that is disconnected and connect mains hose to heater and power out keep revers flushing don't use Cir on alloy but u can get central heating flush that will work its called FERNOX system cleaner very good us this i system first run to work a few times then drain then reverse flush good luck iv used it very good

it is the heater core hose it was redesign

indicates that the control for the cabin is not operating correctly
the control for the heater is not turning on fully and the air flow direction control is not moving as designed

your blower motor resistor needs to be replaced if you only have one speed its a small inexpensive part runs about 15 dollars easy to replace.

common impala problem friend of mine has a 2000 with the same problem just cover the grill so that cold air does not blow into the rad it should give you your heat back

i have a 97 and i had to take the vents they just twist and snap out easy then u have screws in there

if you are sure that your heater core is not restricted. then try to recalibrate the climate control panel. if your a/c system is not working then DO NOT ATTEMPT THE RECALIBRATION it will make your lights on climate control panel flash codes forever.
to reclaibrate the climate control panel just have the engine running. turn the mode to vent, the temp to cold, the blower on high, then press and hold the rear wiper wash and wiper buttons at the same time until the panel lights up then wait about 2 minutes for it to run completly when completed. turn off ignition and then restart the engine try to se if you have heat again. if it doesntwork post the codes it gives you after the calibration test.