1997 Oldsmobile Bravada "heater car goes cold few" Questions

...car the heating gauge rises to the red line rather quickly. It is not over heating because it is doing nothing but blowing cold air. The check gauges light comes on. But just before it starts blowing ...

...goes back to normal but heater will only blow cold air I,ll shut heater off wait a few minutes then everything works fine for awhile then it all starts again Souds like it's way low on coolant. The ...

...heater then begins to blow hot air, after a few seconds, it goes back to blowing cold..the temp gauge continuously goes up, then drops...and the air changes from hot to cold. is this a heater core or ...

but then goes back to cold need to replace your AC & Heater control unit..it is not reading correct temperature and shutting itself down...but that being said try flushing your heater core first..

...heater in car is hot, temp gauge shows hot,remove cap surge of water level goes down, temp drops to normal on gauge engine fan stops, heater blows cold until U start to drive again. Heater blows hot ...

heater off and wait a few minutes temp gauge goes back to normal and everything works fine for a while It probably low on coolant. The heater will blow cold when there is not enough water (coolant) to

car's cooling system, other than the hot coolant is the heat source. 95% of all "no-heat" issues are related to heater controls and/or the heater core itself. Since you get some heat, and then it goes

heater control, a vaccum leak (depending on make and model of car) a short in the wiri g or a bad servo that switches from cold to hot. But first let the car get to operating temperature with the heat

heater core should fix problem Your problem could be 1 of a few so take off the cold one before the switch and see if the water comes out on its own,then check it again after you have refitted back on

car warmed up and then turn on the heater you can place your hands on the heater hoses right were they go into the fire wall. If one is hot and the other not, you have bad heater core. Also a good way