1993 Jeep Grand Cherokee. Heater core leaking, chk engi light on.

Check the heater core it sounds like it is leaking and needs replacing.

the heater core is removable from the climate control unit. The climate contriol unit has to be removed to replace it. The A/C system must be evacuated and lines removed as well as the dash, to access the climate control unit. The steam is coming from a leaking heater core.

If it is on the inside of the windshield then you have a heater core leak. To fix this you need to replace the heater core.

A bad heater core could cause a couple of isses. If it is plugged internaly you would get no heat. If it is leaking you would have anti-freeze dripping into the cab on the right side or dripping under the car in the area of the right floor board.

Heater core is leaking, Turning heat off does not stop water flow through heater core, it only diverts air away from it.

Your water heater core is beginning to leak. Eventually, you will find an antifreeze puddle on the passenger side floor which can eventually lead to the rupture of the heater core and a large amount of antifreeze in gaseous form within the cars interior.

It is time for a new heater core. Should you want to go the cheapest route, you can purchase a bottle of copper plugging agent. Ask your local car part guru what he has to plug a leak in the heater core.

Be forewarned: should you go this cheap route, you risk clogging your heater core for good and you will no longer have heat until you replace the heater core.

You probably have a leak in the heater core which is creating steam in the defrost system. So the heater core most likely needs to be replaced.

When I turn my heater on, after my 1993 Jeep Grand Cherokee has warmed up, there is a dusty, watery smell for a few minutes, then it goes away. Also, it doesn't put out as much heat as I think it should. I don't think the heater core has a leak, because I always seem to have the same amount of coolant in the radiator and the heater core is not leaking on the inside of the truck.

chk engine compartment firewall for studs that come through from dash. also chk interior at floorbaord above driveline tunnel behind center console.

your heater core is leaking its not fog on your windows its from the antifreeze having same problem so im replacing it myself but having problems getting the dash off its a head ache the heater core costs 91.99 at autozone i priced the job at a few shops and it runs between 7 and 900 dollars.good luck man