1998 Chevy Blazer LT 2wd

That is not normal for any vehicle.

It could possibly be a low level of coolant in the radiator. I've had this happen before. My old Dodge Van had a slow coolant leak. During the winter it would do exactly what you're talking about if I didn't keep the radiator topped off.

When the radiator isn't full, there won't be enough liquid in the system to circulate through the heater core, which is what transfers the heat from the cooling system into your vehicle. When you start moving, naturally the engine speed will increase, which helps circulate the hot liquid through the heater core...Thus the heat suddenly starts working again.

I'd check that first. By the way, you want to add coolant only while the engine is running and is up to full operating temperature.

~jp

Brenda67

if this truck has dexcool in it and it is not low on coolant .. ( if it is low on coolant you will need to fix that first) you need to drain and flush system w/a good cleaner .. back flush heater core and refill with green anti freeze // from what i have read the coolant is causing flow problems when it gets low and air gets into the system .. also replace the radiator cap with a new correct cap ..

paul

Brenda67

if this truck has dexcool in it and it is not low on coolant .. ( if it is low on coolant you will need to fix that first) you need to drain and flush system w/a good cleaner .. back flush heater core and refill with green anti freeze // from what i have read the coolant is causing flow problems when it gets low and air gets into the system .. also replace the radiator cap with a new correct cap ..

paul

Brenda67

if this truck has dexcool in it and it is not low on coolant .. ( if it is low on coolant you will need to fix that first) you need to drain and flush system w/a good cleaner .. back flush heater core and refill with green anti freeze // from what i have read the coolant is causing flow problems when it gets low and air gets into the system .. also replace the radiator cap with a new correct cap ..

paul

what's the trick into getting the heat to

I mean I am not like an idiot here...lol!!! But

=========== ===========

No trick......

simply fix the problem.

~:~ Marsh Monster ~low radiator or loosing vacume to the control assembly~