93 APV climate control

Help! I had the a/c repaired & charged in August after a lack of a/c. Heat started dwindling in Oct. & is now non-existant. Overheated w/o warning on a trip. Had the wat pmp/therm/cap replaced & still NO HEAT!!! Van warms up on the guage in about 10 mins in cold :eek7: weather. Ideas? -- Thanks

More info. Are you losing any coolant or are your windows fogging up. Also feel both heater hoses when the car warms up, are they both hot? I am not familar with the climate control, but if your windows fog up and the hose coming out of the heater core doesn't get hot it could be a bad heater core, might also smell sweet smell of antifreeze. If you are losing coolant and its not leaking anywhere and its has white exhaust it could be the head gasket. Who put in the thermostat, just a thought but some people do put them in backwards. If the thermostat is put in backwards it won't allow coolant through and the heater hoses wont get hot. Just throwing out some ideas.