Spraying fuel out the front.

Not sure what type heater you are asking about. If oil furnace, then the igniter rods need to be resharpened and adjusted into proper alignment.

Uh oh, sounds to me like your heater core is leaking, and I also am willing to bet that if you feel your floor boards, they will be soaked with water. Most are difficult to change, but you need a new heater core installed. Keep an eye on your coolent lvl, you car might start overheating. heare is what one looks like:and it is located under, behind your dash on passenger side. You may have to revove most of the dash to get to it. If you want to try this job yourself, google : 2001 jeep grand cherokee heater core replacement.

sounds like you have a bad heater core

Suspect leaking AC condensate drain line, unless it smells like anti-freeze, in which case its the heater core.

You need to either clean your nozzle assembly or replace it.Cleaning it can be done as follows, you need carb cleaner Q-tip and a tooth pick. First soak the nozzle in carb cleaner, then use the tooth pick to remove any obvious large pieces of what ever just do not damage the front of the nozzle the Q- tip is for cleaning all the exterior surfaces. Now that you have gone this far you need a compressor and an air gun to blow high pressure air backwards and forwards thru the nozzle this should clean it out. On older models they have a screen assembly behind the nozzle if yours does clean it as these corrode while in storage. Put the assembly back together and test nozzles atomize the fuel (fog) not spray, so watch carefully if it sprays fuel you need to replace the nozzle, pay attention to the spray angle and GPH rating printed on the side of the nozzle it is very important when purchasing a new one that you buy the exact same rated nozzle. Good Luck

This is usually an indication that the heater core is leaking. You will have to replace the heater core. This is not a fun job at all.

Most likely it will be a bad tub seal and bearing. This is a very labor intensive job I would probably call a tech.

are you sure it is water, smell it to ensure it is not antifreeze (smells sickly sweet), if it is antifreeze possibly heater core leak, otherwise check for plugged evaporator drip tube (with a/c of course), could also be leaking body panel (cracked chalking etc). hope this helps

Water on the floor indicates a heater core leak. You may also find a mist coming from the inside of the car when you run the heat and or AC. If this is the case, have your heater core checked out. Best of luck.
Greg

Do you smell a sweet odor? like from the coolant in your radiator?
Your heater core may be leaking coolant into the car.
Or your front window or door seals may be leaking.