The thermostat is located on top of the water pump. I would not attempt replacing it until you have looked at a repair guide, such as Haynes. The water pump is located above the Optispark distributer, and if you do not follow the proper proceure, you will drench the distributer and have a lot of problems. Your problem sounds like it may be a clogged heater core, which is not uncommon with these vehicles. You can try to have the heater core flushed out and see if that would help. If you were having trouble with the thermostat, the vehicle would probably be overheating. Frequently, the contacts on the heater door acturator will corrode and lose contact causing the door to remain in the open condition. Code 32 on HVAC in the climate control. Clean with deoxit and reattach to test. Correction, the code it 10 for open contact to the actuator.
Thermostat stuck open or heater core clogged. Bad radiator cap or small hole in cooling system.
Could be a bad thermostat or heater core
You may need to replace your Thermostat or your Heater Core.
underneath the dash board
Your thermostat is stuck open.
You need to change your thermostat in the car.
You should check the thermostat and the fuse for the heater.
One reason your home electric heater is blowing cold air is the heating elements are burned out. A bad thermostat may also be the problem.
it could be a couple of things you could have a bad thermostat or a bad heater core
Low on coolant. Bad thermostat. plugged heater core. Temp blend door malfunction.
start by changing the thermostat
Have you checked your thermostat?
you need a new thermostat and possibly some anitfreeze
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heater core plugged or air locked check to see if hoses going to heater core are hot
Low on coolant. Stuck open thermostat. Plugged heater core. Temp blend door inop.
The temperature of the coolant entering the heater core is controlled by the engine thermostat. The engine coolant thermostat is generally located at the engine end of the upper radiator hose.
Check for a thermostat that is stuck open. Also can be a clogged heater core, or defective heater temperture control valve.
check the coolant level, or, possible stuck thermostat.
try replacing the thermostat. It is probably the easiest fix, as well as cheapest.
Possible cause thermostat bad stuck open
Change your thermostat. Mine had the same problem and it was stuck open.
The most common reason the heater is blows cold air on a 1999 Ford Winstar is a bad thermostat or blocked heater core.
The heater core is usually your last resort. So now start from the end to the beginning, core, thermostat, flush, hose, fluids. Follow the trail and your bound to find your answer.
If you are not getting heated air blowing from the heater core and your engine coolant temperature gauge is showing LOW or below normal , ( then YES , IT'S POSSIBLE that your engine cooling thermostat is sticking open )