Table of Contents
How does a coolant fan switch work?
A coolant fan switch is a small and very simple switch comprised of typically two wires. This switch is configured to work based upon the temperature of the engine. As engine temperature rises to a specific threshold, the switch is activated powering on the coolant fan.
How do you know if your radiator fan switch is bad?
Bad Cooling Fan Relay Symptoms
- The engine runs hot or overheats.
- The cooling fans don’t work.
- The cooling fans keep running.
- Warning lights.
- Poor air conditioning performance.
- Swapping Relays.
- Measuring the Relay Coil’s Resistance.
- Listening for Noises.
What does a temp switch do?
The coolant temperature sensor, also known as the coolant temperature switch, is an engine management system sensor that is used to monitor the temperature of the engine’s coolant. Most coolant temperature sensors operate using electrical resistance to measure the temperature of the coolant.
Where is the coolant fan switch located?
The cooling fan switch should be located near the thermostat housing on the left side of the engine, behind the distributor assembly.
How do you test a 1-Wire coolant temperature sensor?
If you have a new sensor on hand and want to check it, you can do this easy test. Connect the black lead of the meter to the body of the cold sensor and the red to the terminal. You should have a reading of approximately 2000 ohms. Check the warm sensor in your engine.
How many wires should be in a coolant temp sensor?
The engine coolant temperature sensor is temperature-variable resistor, which usually has a negative temperature coefficient. It is a two-wire thermistor immersed in coolant and measures its temperature.
What’s the difference between on and off on a coolant switch?
If your coolant temperature is 210 degrees, it’s the same as seeing 185 degrees, and it’s switched on. This sender detects 185 degrees and turns on, and when the temperature drops to about 175 degrees, it turns off; about a 10 degree window is the difference between on and off.
How does a cold engine switch work on a fan?
That sender contains a switch, rather than a variable resistor, and is either on or off. A cold engine will provide an open circuit, and no current can flow from the sender to the fan relay. Once the temperature rises to a set level, in this case about 185 degrees, the switch closes.
How does the coolant temperature sensor work in a car?
The engine coolant temperature sensor (ECT sensor) is a temperature sensor in a car’s engine that essentially determines and measures the temperature of the engine.
How does a float switch work in a cooling tower?
New Float Switch Working Principle. Float switches and water level controls usually start out closed, meaning there are no alarms that need to be triggered because the water level is at the predetermined height. Once the cooling tower starts using the water for its industrial processes, the water level starts dropping.