Thread: Car isnt warming up

What's goin down guys.... Today I put in a new thermostat in my 1994 Pontiac grand Prix 3.4 liter. So I put everything back on the car n put in new antifreeze. Then I started my car up to let it warm up n after 15 to 20 mins. The engine was warm but there was cold air blowing out of the vents. Can u guys help me out to figure out what's going on with my car

heater core blocked. Or blend door fail.

suggest flushing heater core/inspecting blend door.

So does that mean I would have to pull the heater core out to do so, walk with the blend door.

You can buy flush tees to hookup to the heater hose and flush it out with the garden hose.

This time of year, its kinda difficult if its cold where you are, but it can be done.

Blend door you'd have to lookup and see whats involved in locating it.

I have no direct experience with those cars, so either or may be more likely than the other. You'd have to do some searching of your own to see whats what.

Also deleted your duplicate thread. Keep it to one thread per topic. Thanks.