1998 Buick Regal GS 3.8l V-6 Supercharged

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Tom6024 - 21 Nov 2005 20:55 GMT

The car is designed with a duel control temp. control system. I do not get
any heat out of the driver side heater or defrost. I tried to remove the
pit cock from the radiator so I could drain the radiator and flush out the
cooling system and replace the thermostat, but I could not get the plastic
plug out of the bottom of the radiator. Why?

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Steve Mackie - 21 Nov 2005 22:41 GMT

> The car is designed with a duel control temp. control system. I do not get
> any heat out of the driver side heater or defrost. I tried to remove the
> pit cock from the radiator so I could drain the radiator and flush out the
> cooling system and replace the thermostat, but I could not get the plastic
> plug out of the bottom of the radiator. Why?

Turn counterclockwise and pull lightly. I use pliers or an adjustable wrench
on mine.

Steve

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Tom6024 - 22 Nov 2005 19:23 GMT

Thanks Steve for the suggestion. I tried that and the little white plastic
drain plug would not turn.
Is there something in the heater case to split the two sides of the car?

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KjunRaven - 24 Nov 2005 19:11 GMT

> The car is designed with a duel control temp. control system. I do not
> get any heat out of the driver side heater or defrost. I tried to
> remove the pit cock from the radiator so I could drain the radiator
> and flush out the cooling system and replace the thermostat, but I
> could not get the plastic plug out of the bottom of the radiator. Why?

you have to pull down on pitcock after rotating......every dual zone i have
ran into w/your symptoms has came down to the control unit in the
dash...havent seen your particular vintage and model tho. just impalas.....

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jshammer - 02 Dec 2005 06:36 GMT

if you get heat from one side and not the other your problem is in the
heater asm not the coolant you only have one heater core

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