How do you test a thermo switch on a radiator?
Turn on the burner and slowly increase the water temperature. The ohmeter should be turned on and have a reading of high resistance. When the water reaches between 180 to 220 degrees Fahrenheit, the switch should turn on and the resistance seen by the ohmmeter should change to zero.
How does a radiator temperature switch work?
The tip of the CTS is probably located right next to the engine coolant. The sensor works by measuring the temperature that’s being given off by the thermostat and/or the coolant itself. The temperature is then sent to the on-board control system.
Where is the thermo switch located?
The cooling fan switch should be located near the thermostat housing on the left side of the engine, behind the distributor assembly.
What does a thermo switch do?
FACET Srl | Thermo switches and water temperature sensors. This series of devices prevent the engine from overheating by activating radiator cooling fans, measuring the coolant temperature and controlling the level gauges and warning lights on the engine control unit.
How do I know if my thermal switch is bad?
If the temperature on the griddle or skillet reaches above the cutoff temperature of the switch and the multimeter does not move from the zero reading, the thermal cutoff switch is bad and needs replacing.
What are the signs of a bad temperature sensor?
Symptoms of a bad or failing coolant temperature switch (sensor)
- Poor fuel economy. One of the first symptoms associated with a problem with the coolant temperature sensor is poor fuel economy.
- Black smoke from engine.
- Overheating engine.
- Check Engine Light comes on.
What is a normal coolant temperature?
between 195 degrees and 220 degrees
Normal Temperature engine temperature gauge Most experts agree that your engine should run between 195 degrees and 220 degrees.
Why is my radiator fan not working?
If the fan doesn’t come on, you need to look for a blown fuse or breaker. In older cars, you might have a fusible link – this is wire within an insulated block of rubber. Try to grab the end and stretch it. If the wire stretches, the wire link could be broken and you’ll need to replace it.
Where should a Thermo fan switch be placed?
It should be in the head or manifold. It’s a closed system, so at some point the temperature of the water should stabilize and be the same throughout (radiator/engine), but I personally care about how hot my engine is running, not how hot the radiator is.
What are the symptoms of a bad thermostat?
5 Symptoms of a Bad Thermostat (and Replacement Cost)
- #1 – Temperature Gauge Reading Higher (or Lower) Than Normal.
- #2 – Sudden Air Temperature Changes Inside Vehicle.
- #3 – Coolant Leaking.
- #4 – Rumbling Noises.
- #5 – Heater Malfunction.