The thermostatic switch has a capillary tube that is stuck into the evaporator and picks up a temperature signal that moves an internal electrical switch. This switch makes and breaks electrical power to the compressor clutch. This switch could also be called a defrost switch.
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When the coolant temperature reaches a preset value (normally 92 °C or 198 °F), the temperature switch (normally referred to as the thermofan switch) closes and cause the driver's side fan to run. We'll refer to it as the primary fan. Since the resistor in series with the fan is still in the circuit at this point, the fan runs in slow speed.
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The temperature control switch is the user control interface for the A/C system. It allows you to change the temperature inside the passenger cabin. Since it is electronic, it may wear out over time. If it short circuits, or if any corrosion is present inside the switch, it may start to malfunction or not function at all.
Jan 26, 2019 · The engine coolant temperature sensor simply tells the car's computer (ECM) the current temperature of the vehicle. When the temperature of the coolant reaches between 75 and 95 degrees (depending on the manufacturer specifications), the ECM instructs the radiator fan to turn on and start cooling down the liquid.
1. PO temperature control mode: This value must be set when the thermostat is used for the first time. If it is used for heating, it must be set to H. If it is used for cooling, it should be set to C. 5pcs Digital Temperature Control Switch Adjustable Thermostat Temperature Switch 12V Cooling…$24.99.
Aquastat Temperature Control - The boiler aquastat controls the temperature of the water inside the boiler jacket. The boiler aquastat is a device to a boiler like a thermostat is to an air conditioner, heat pump, or gas/oil furnace.
Jan 03, 2019 · Types of sensors include oxygen sensors, light sensors, switches, speed sensors, and the like. Actuators can be motors or lights, or similar. A typical sensor circuit, say engine coolant temperature, might be the wiring between the engine control module (ECM) and the engine coolant temperature sensor (ECT).