Does the car have a control valve or does it adjust the heat by closing off the outside air? The valve if it has one would probably be under the hood in one of the heater hoses. If no valve, is the outside door closing? Control cable may be broken or have come loose on either end. I'm assuming the car does not overheat and the water is circulating. Get it warm and feel each hose where they connect to the heater core. If both equal, there has to be a door not closing somewhere. Too much outside air for it to heat up. Sometimes the simplest things are the hardest to find or see.
You need to check coolant temperature sensor and the water pump.
When the thermostat and radiator were replaced, coolant could have dripped into an electrical connector or a sensor could be disconnected or damaged. Check the temperature sensor and crankshaft sensors first.
Be careful there is a temperature coolant switch mounted next to the thermostat housing. I thought this was the sensor and replaced it by mistake. There is another sensor.
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.
The coolant temperature sensor is in the top radiator hose on a Rover 200. The coolant temperature sensor is a type of thermostat.
the hoses leading to and from your radiator might be clogged. If you had a rusty radiator, the rust may have clogged the hoses that carry the coolant. you should check all your hoses and even flush them out.
your thermostat is closed. needs to be replaced. inexpensive part but can save your engine from overheating.
The thermostat in a car regulates the coolant temperature inside the engine. When the engine is cold, the thermostat is closed, allowing the heat from the combustion chamber to heat the fluid (coolant) in the coolant galleys in the engine block. Once the engine reaches an optimal temperature, the thermostat opens, allowing coolant to flow through the radiator. The thermostat then controls the flow of coolant to hold the engine at its optimum operating temperature, irrespective of engine load and operating condtions.
Run engine to normal operating temperature witout radiator cap Observe coolant circulation If coolant blows out of radiator - could be a stuck thermostat If no circulation could be a bad water pump
The defrost is cooing your coolant by circulating the fluids through the heater core. Check the water pump to insure that its pumping and check the radiator for blockages in the fins. Also check for an air bubble that can happen when a thermostat is replaced.
If your radiator isnt leaking and car is having a over heating problem and coolant spewing out. Chances are your thermostat needs replaced. possible the radiator needs to be flushed. But more likley its thermostat
likely possibilities are the following. Low or bad coolant , water pump, thermostat needs changing, clogged radiator or lines, coolant temperature sensor or radiator fans not coming on, head gasket Also check the radiator caps on the hose and the overflow container. That was my problem. One or both may have to be replaced.
The coolant is pumped from the thermostat housing into the top of the radiator but not until the thermostat opens.
when your coolant in your engine gets a certain temperature,usually 180 degrees,your thermostat opens and your coolant circulates through your radiator and it keeps your engine cool so it wont overheat.
Coolant at proper level? System air bound and needs to be purged? Water pump not circulating coolant? Defective thermostat? Collapsed radiator hose?
Low coolant level? Cooling fan not working? Thermostat not opening fully? Water pump not circulating coolant? Plugged or restricted radiator? Defective radiator cap?
Certainly. If the engine coolant is flowing freely into the radiator, it will remain quite cool and the coolant that circulates into the heater core will never warm up. The thermostat blocks the coolant from entering into the radiator if the temperature is below the set level on the thermostat. Usually 185, or 195 degrees F. Engines don't run as efficiently at the lower temperature either, so if the thermostat isn't working right, replace it.
The engine thermostat controls the flow of coolant to the radiator , it allows the engine to warm up before the thermostat opens in order to limit the maximum operating temperature.
No. The thermostat controls the flow of water through the radiator, not the heating core. Using a thermostat with a higher temperature rating delay the opening of the thermostat (and the flow of water to the radiator) until that higher temperature is reached. This will cause the coolant to run hotter.
No, the thermostat controls the temperature of the engine coolant. As long as the coolant temperature is below the thermostat set-point, the thermostat remains closed. Once the temperature arrives at the set-point, the thermostat starts to open, sending heated coolant through the radiator. The radiator then cools the heated engine coolant and the water pump forces the coolant back through the engine. The heater control valve allows more or less of the engine coolant through the heater core. Since the coolant should be very near the set-point temperature of the thermostat, you should be getting hot water through the heater core to warm the inside of the vehicle. The engine coolant is there to keep the engine from melting down or from breaking metal parts and burnng off the oil. It just happens that the heated coolant is useful to warm the inside of the vehicle.
The function of a car thermostat is to ensure that coolant gets to the radiator when it should. It blocks the coolant from reaching the radiator when the radiator is cold, and then lets it flow once it is heated up.
System airbound? Coolant level? Temperature control cable?
it is possible that you have a faulty thermostat or you have air pockets in the new radiator when the new coolant was added
Drain about 1 gallon of coolant from radiatorLocate removable housing a the engine end of the upper radiator hose and removeNote how thermostat is installed in housingClean both surfacesInstall new thermostat and gasketRe-fill coolant slowly to prevent an air lockStart engine and look for leaksRun engine to normal operating temperature with heater onRe-check coolant level