Question about 2004 Chevrolet Impala

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2000 Impala heater takes a long time to warm up

AFTER STARTING AND RUNNING FOR A MINIMUM OF THIRTY MINUTES A LOW AMOUNT OF HEAT TO THE CABIN IS PRODUCED WHAT IS CAUSE AND HOW DO I CORRECT IT

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  • redhmm402 Jan 02, 2009

    thanks will try

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Hi there, sounds like your thermostat is stuck open therfore not allowing the coolant to warm up to proper operating temperatures. I would start by replacing the thermostat on the vehicle. This is fairly inexpensive part . hope this helps you out.

Posted on Jan 02, 2009

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1 Answer

Fan stays on ,wont let the Radiator get hot .so i m not getting any heat


Hi Fred.

I'm not totally sure I understand your question, but I'll take a shot. Are you saying that the engine fan stays on all the time for your car, keeping the radiator cool, and so you're not able to get any heat in the cabin air? Or possibly that the cabin fan is on all the time and you can't get any heat because it's keeping the radiator cool.

unless there is something very odd about your car (or you're living at the south pole), your engine coolant will be plenty warm within a few minutes of starting. If you are doubtful, drive the car for 5 to 10 minutes, stop, turn off the motor, pop the hood, and carefully move your hand close to the radiator. The blower fan helps transfer heat, but that's to move the coolant temp down probably into the 150-200F range.

if you're not getting any cabin heat, I'd have stronger suspicion about the heater core for your air system. In the majority of vehicles, there is a loop of coolant that comes off the back of the engine block, through the fire wall, and up to a U-Bend of pipe. When the heater is off, the coolant is just re-directed back to the engine. As you turn the knob or lever for cabin heat, it'll turn a switching valve to shunt the hot coolant into a heat exchanger/mini-radiator that the cabin air blows past. This system being a mini-radiator is why highways with long uphill grades will advise motorists to turn on their heater full heat, highest fan, when climbing in the summer. it's an additional way to keep the engine from overheating, even if it sucks for people in the vehicle.

Depending on the car, it can be either easy or really involved diagnosing or repairing the heat exchanger. if you go this route, you'll want to make sure that the coolant is circulated through the core thoroughly and that the coolant-system is de-bubbled.

Good Luck!
D

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