if the blower motor works most likely heater core is bad. need more info
It could be that your head gasket is blown.
the reason for water coming out from under the dash is that a hose could have broke or you have a problem with your heater. your heater works off of the water in the radaitor and since it gets hot from the motor well it serculates threw the heater and that's who your heater works
That or the thermostat.
could be head gasket problem. does your heater work? might need heater core , clogged up. do compression test. or bypass heater core and see if that works.
If it now works it could be a bad connection to the sprayers.
Toaster above is what they are looking for since it has elements like a heater but one could argue an electric stove works the same way-
Eventually heater will stop working when coolant level gets low enough. Pressure test system to determine where leak originates
Maybe low coolant level
if engine seems to be over heating or getting hotter i would change the thermostat its cheap about 10 bucks and not to hard but if its not that than it could be not enough anti-freeze or heater core
The rear defrost is electric. The heater works off the hot water in your radiator running thru it and a fan blowing the heat into your compartment.. check your thermostat, it could be that your heater core isn't getting and water to it, that is were your car get's it't heat from, if not that it could be lack of water
Get the air out of your heater core.
The heater motor speed resister is burned out.
A ceiling fan heater is a type of heater which works in the same way as a standard ceiling fan, but with a heating component. A person may want to use this type of heater if the room does not have access to central heat or any other heat source. An individual may also want to use this type of heater if there is not enough floor space for a standard room heater.
BY CONVEntional current
I would first check either the controls to the front heater core or a blocked front heater core. It could also be a blocked or missing heater hose to the front heater core, although that seems quite unlikley.
replace front heater corefront and rear have independent heater cores
heater hoses might have been disconected
how is it my heater control on my ford fiesta flight 1998 only works on no. 4
a solar heater works by collecting warm sunlight and solar power and stores the water in a tank and heats up the water from there
It could possibly be a clogged heater core
You need to start out by checking the a/c-heater controller and the a/c-heater doors behind the dash for proper operation..............
It could be a blocked heater core if your fan works... Or it could be your thermostat... I have an 03 that is doing the same thing. I just replaced the thermostat and it is still doing it. There is a site called BlazerForum.com you may get some better answers there
Does blower operate at all? If not it could be blower motor, fuse/fusible link, faulty switch, blower resistor pack...sorry not enough info for much more help than that (model, year, just heat not working...or a/c also?)