Heat is coming from the engine.
Probable broken door inside the dash. Have a mechanic check the ac system for trouble codes.
There are two hoses that come from the thermostat at the top end of the engine at the front of the car. These two hoses go back to the firewall. Just above where they enter into the firewall there is a vacuum switch. It has two small hoses feeding it. One of the hoses gets its vacuum from the intake manifold and the other gets eventually fed to the heat control valve. The heat control valve is located on the opposite side of the firewall. You will notice that when the engine warms up the top hose is much hotter than the bottom hose. Upon start up the bottom hose might be moderately warm because a small amount of warm coolant will flow through it. After the engine is warm this coolant flow will stop because the heat control valve is closed even though you have the heat at maximum. Simply unplugging the electrical connection to the vacuum switch will open the heat control valve and you should have heat inside your vehicle again. You can also bypass the vacuum switch by unplugging both vacuum hoses and getting a piece of hose to connect them together. This will give you more heat. Ultimately the vacuum switch needs replacing. Also note that flushing your radiator core is easy to do. You should be able to connect a garden hose to the top hose and flush out the core. The heat control valve does not prevent this when the engine is off. Ultimately, you are asking this question because when you turn on the heat in your Jeep it blows cold air. You might find the heat control valve but realize that it really isn't the problem. It is the vacuum line controlling this valve that is the problem and the vacuum switch connected to it. The grand cherokees never had the water valve.
you lay your records on top of the vent this allows them to be able to warm up for a better standard of playing them
on the transmission
You might want to check on the side right beside the vent. There is a switch that goes up and down with a solid square on top and an open square on the bottom. This controls whether or not your vent is open or closed. Just try sliding the control to the open square and that should open up your vent. If that doesn't work then something could be blocking your vent. Such as a clog.
from the air in the vent to the air in the room
Leaking heater core
Sounds like the heater core is leaking!
What causes heat to only come out of the defrost and vent but not the floor of a 1995 S10 Blazer?
The heat valve is stuck.
The air is all heated in the same place. If you have floor heat and no defrosters then the problem is likely in the vent doors or the vent door controller. If you have no heat at all then it's in the controls or operation of the heater core.
my 1998 gmc jimmy has no floor heat but i have defrost and ven heat
Yes. It connects to the inside of the tank, where the hot water is. Heat from the hot water will heat the vent pipe by conduction. The top end should be much warmer than the bottom end, near the floor or outlet.
Leaking heater core.Leaking heater core.
The most common thing will be that you have a leaking heater core...........
Only by jury rigging it ... the normal insulation is designed to vent the heat outside. But it can be used as a form of electric heater.
A fine mist coming from the air system is engine coolant. The most common cause is a leaking heater core.