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Yes if the thermostat doesn't close coolant will not reach normal operating temperature - therefore vehicle will run cold and not produce adequate cabin heat

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17y ago

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How do you know if your cars thermostat bad?

One Coolant Hose is hot and thew other is cold...


Why does the thermostat in my car stay on cold?

i think the reason might be your cooling system, check the basics. the basic would be to see if there is low coolant in your engine when it is cold and in the radiator. If that is fine then check the thermostat located in your cars engine. It might be open and not checking your cars temperature right or might need to get replaced.


What does the thermostat on a car do?

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.


What does it mean when the temperature gauge keeps going from cold to hot then back to cold?

Could be low on coolant or a sticky thermostat.


Could the temp coolant sensor cause the truck to run cold?

The coolant sensor moniters the coolant temperature. A faulty thermostat could cause the engine to run cool.


Is the thermostat replaced by the coolant bypass solenoid?

No, the thermostat and the coolant bypass solenoid serve different functions in a vehicle's cooling system. The thermostat regulates the flow of coolant to maintain the engine's optimal operating temperature, while the coolant bypass solenoid controls the flow of coolant around the engine when it is cold. They work together but are not interchangeable components.


Why would a 2001 Honda civic temperature gauge is moving from cold to hot?

Probably low coolant or a faulty thermostat


What controls the coolant flow through a radiator?

The thermostat regulates coolant flow through the radiator by opening and closing based on the engine temperature. When the engine is cold, the thermostat remains closed to allow it to warm up quickly. As the engine heats up, the thermostat opens to allow coolant to flow through the radiator and dissipate the heat.


Why does the temperature gauge fluctuate in cold weather and heat comes on and off?

In cold weather, the temperature gauge may fluctuate as the thermostat regulates the temperature by turning the heat on and off to maintain the desired level of warmth in the house. This cycling on and off is a normal part of the heating system's operation to keep the indoor temperature consistent.


What is a P0128 error code for a 2004 Dodge Caravan?

P0128-THERMOSTAT RATIONALITY When Monitored: The engine running. During cold start. Set Condition: The PCM predicts a coolant temperature value that it will compare to the actual coolant temperature. If the two coolant temperature values are not within 10°C (50°F) of each other an error is detected. Basically your thermostat has failed.


Why does your cars hot cold meter not show you how hot your car really is?

The engine coolant temperature sensor is probably at fault.


Thermostate dose the point of it go up or down into the engine block?

The thermostat is typically mounted on the engine block or in the coolant passage, and it controls the flow of coolant to and from the engine. When the engine is cold, the thermostat remains closed to allow the engine to heat up quickly. Once the engine reaches the desired operating temperature, the thermostat opens, allowing coolant to flow into the engine and maintain optimal temperature. Therefore, the thermostat itself does not move up or down but operates based on temperature changes.