Can a bad thermostat cause the fan to run?
If the thermostat is stuck open (allowing coolant to flow) it can cause the engine to run cooler than normal so obviously the fan wouldn’t come on…..but not like the engine/coolant can be running too hot and the thermostat somehow effects the sensor reading or operation of the fan.
Are both radiator fans supposed to run?
They work separately, unless the car is hot, then they both come on. Does the A/C fan even work? Turn on the A/C to see if it does come on.
What are the signs that your coolant temperature sensor is bad?
These are the most common problems: 1. Your check engine light is on: If the engine’s computer detects a problem with the coolant temperature sensor, or its circuit, it will turn on the check engine light. 2. Your engine stalls: When the engine is first started, it will require more fuel in order to idle smoothly until it’s warmed up.
What are the signs of a bad cooling fan?
Common signs include the engine running hot and cooling fans either not functioning or running all the time. 1. Engine running hot 2. Cooling fans do not function 3. Cooling fans stay on at all times Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.
What happens when the coolant temperature of an engine goes up?
Engine efficiency, power and fuel economy all improve as the engine temperature rises. Ideally, the engine will run as hot as possible without boiling its coolant or damaging its components. But a faulty engine coolant temperature (ECT) sensor can cause havoc on an engine or its related systems.
How does a coolant sensor work on an engine?
Most coolant temperature sensors operate using electrical resistance to measure the temperature of the coolant. This signal is then sent to the computer so that changes can be made to the engine’s timing and fuel calculations for optimal performance, as engines require more fuel when they are cold, and less fuel when they are fully warmed up.