Try bleeding the system. Sometimes there's a valve or sometimes you just open the raditor cap or reservoir
Vehicle takes an excessive time to attain normal operating temperature Heat not HOT with coolant full - thermostat not closing properly Vehicle heats up too soon - No heat with coolant full Coolant boils out of reservoir or top of radiator - thermostat not opening
It could either be your thermostat or your waterpump. In either case you could have full coolant levels but with a faulty thermostat or water pump your car will still over heat. I would start with the thermostat because those are usually the cheapest and easiest to fix.
most likely you dont have enough coolant to reach heater core. make sure your full
You may be low on coolant. Check the reservoir and the radiator, if it is empty check for leaks in the system. If it is full you may have a stuck open thermostat causing no heat.
It's likely the thermostat. That's assuming the coolant is full. Thermostat runs $11 for the 3.5.
To let the engine warm up by closing flow of coolant. When operating temperature is reached the thermostat pops open allowing full flow of coolant. Totally necessary in winter !
Your thermostat has nothing to do with your coolant light. Your thermostat, if bad, would make your van run extremely hot, or not heat up at all. Your coolant light is probably a bad sending unit or ground.
Either the thermostat is stuck shut of the water pump is bad. Make sure that the coolant is full as well, then check the thermostat and pump to see why the coolant isn't flowing.
Thermostat stuck open. Replace.
Most common cause for overheating is low coolant, check and make sure your coolant is full when engine is cold. If coolant is full, the thermostat may be bad. Most thermostats open between 180 and 210 degrees if it gets higher than that and coolant is full I would replace the thermostat because it's a cheap repair, usually under $10 for the part. The thermostat is located in the housing of the engine where the upper radiator hose goes in. If overheating continues, you may have a bad water pump or plugged radiator.
Probably your thermostat
Check the level of coolant. If the level is full, replace the thermostat.