Originally Posted by drum4fun27302
1st check your antifreeze level. If full,Engine at operating tempersture touch the 2 heater hoses that go thru the firewall (passenger compartment). They should both be really warm (even hot) so be careful.
If they are coldish , you have a restriction somewhere in the cooling system , and if they are warm/hot , you have a door problem inside the dash.
I *think* I had a similar problem on my old van. Could be the coolant level, but I recall the thermostat was broken. (Don't forget to "burp the baby" when replacing coolant.")