2007 Chrysler Town & Country Overheating

Sounds like you have been working this a while. Is there any evidence of coolant or steam from the exhaust? Either the cooling system isn't completely full or you might have an internal leak. Have you tried an pressure test of the cooling system? This can sometime provide additional information on where the trouble may be.

It has been leaking slightly for a couple months. I tried a couple "radiator leak stop" products, but no positive results. I flushed the coolant when replacing the radiator, but still see some copper particles in the coolant. I will flush again with distilled water when I replace the water pump just in case that residue might cause issues.

I also parked facing slightly uphill, jacked up the front of the minivan as much as possible, and ran with the radiator cap off several times. I ran it until the engine was hot and the coolant was starting to overflow. Haven't seen bubbles in several tries. Fairly confident the system is full/purged.

I stopped by the auto parts store before work and bought a replacement water pump and two more gallon jugs of the fancy coolant this vehicle uses, and will attempt replacement on Sunday (my day off).

Doesn't leak coolant. I check it when cold before every start. No steam, hoses are well-pressurized when engine and temperature gauge on dash are hot. Lower heater core hose for cabin gets hot, but upper heater core hose, immediately above lower heater core hose, only gets warm. Lower radiator hose is cold.

i have a 2007 chysler town an country the upper radiator hose went flat so i replaced it it is now overheating could this be the thermostate???