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Re: no heat,ch.thermostat,water is circulating,blower...
Check the 'heater control valve'. This valve opens when u turn on the heat switch on the dash, so the hot coolant will flow thru the heater core and provide heat. So although the coolant is circulating in the engine, the valve controlling the flow to the heater core is stuck closed, or not working.
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u probably have air in system.need bleed air out,otherwise water wont circulate and fans will not work.check you thermostat(more likely not a problem).if that dont resolve problem,you need change water pump..let me know
How old is the coolant in your car? If you haven't changed the coolant in a couple of years, you may have sediment build-up in the heater core that is restricting full circulation in the core and preventing good heat output. Feel both hoses at the firewall that go to the heater core. Are both equally hot when the engine is warmed up and heater controls on high? If only one is hot, and the other lukewarm, the core is partially plugged. Pull off both hoses there and run a garden hose at low volume backward through the core. If not sure what is backward flow just run the garden hose through both openings and see if you can remove any sediment or blockage. If both hoses are hot, the core may be circulating fine, and the problem may be in the heater case's doors not opening fully- I think that would be the temperature blend door. When heater controls on full heat, the door should be fully open to let blower air pass across and through the heater core to pick up heat and pass on through to vents.
Check out the heater hoses for warmth. Both should be the same with the water flowing. If they are not, the water is not circulating.
There are 2 ways the heater can work. One style varies the amount of water flow to control the heat levels. The other uses the blend flaps in the ducts to push air flow around the heater core.
If the heater hoses are not circulating water, a part called a flow valve is to blame. Check out the autoparts sites for photos of the flow valve for your car. If you have the blend flap system, a solenoid called a "motor" is not changing the position of the blend flap in the dashes' ductwork.
Yes, the water should be coming thru the hoses. Only 2 things cause water to circulate. They are the water pump (naturally) and the thermostat. If both are good or have been changed, the only thing I can think of is an air pocket in the cooling system. Would need to touch some things before I could tell you more. Good luck.
Since your blower is working and it is a heat issue,thats where we'll
start,First thing is have you checked the coolant level in the radiator when
engine is cold,make sure it is filled to top,next verify you have coolant in
reserve ,Start your van and get it up to normal operation temperature,If your
heat gauge on the dash works correctly it should be 190 degrees,Now lift the
hood and locate the two heater hoses going into the heater assembly at the fire
wall,Both hoses should be hot to hold on to,if both are hot and no heat inside
your problem will be the blend air door in heater assembly. if neither hose
is that hot you need to replace the thermostat in the engine to get it up to 195
degrees. if one hose is hot and one is luke warm then the heater core is
blocked and to blame. hope this helps you.
Remove and raise upper hose at thermostat end and remove lower rad hose. Fill rad with a hose and watch for flow from bottom rad hose and/ or bottom rad hose connecton.......water should fall though rad easily. Honda rads are cheap.....any restriction....replace rad.
Remove thermostat....fill thermostat housing with hose and watch for water flow at bottom rad hose. Flush good.
Remove heater hoses.......flush back and forth until a good flow is present "With heater control set to hot" if no or poor flow....replace heater core.
Stop leak can plug everything.
Also.......not likely causing over heating....but ....at your mileage,if you do not know if the timing belt has been changed.....CHANGE IT NOW! Water pump is optional at this mileage.
you need to first check that the water is circulating if not could be a water pump or thermostat problem also check for signs of oil in the water this could indicate a head gasket problem if your unsure this can be checked out using a special fluid