i can turn the blower speed on low and the air gets warm , but not hot . then i can turn it to high and it get even cooler Check your thermostat, it may be stuck.
you may not have the heater water hoses plugged in
it has a partially clogged heater core.replace the heater core
if this system uses dex-cool flush the system
Your heater will blow cold air only.
Have you checked the heater core? It's happened to me before.
It could be that you need coolant or it's low.
need new blower motor...
You need to first check that you do not have any vacuum leaks and then check the a/c / heater door operations, if all are working then its possible that you have a slightly clogged heater core.........
replace front heater corefront and rear have independent heater cores
check to see you have a thermostat installed. If you have one then you have a damper open due to no vaccum or corroded or foam seal needs replacing
Could also be a short to ground. If it runs all the time that's what it probably is. Get a wiring diagram and figure it out
jaguars blow, the ac is making the cool air. turn it off, to stop cool the cool air.