The thermostat closes (preventing the circulation of cooling fluid through the radiator) while the coolant is below the setpoint. Once the fluid rises to the setpoint, the thermostat opens. This assures that the engine is operating at a specific temperature. Engines are far more efficient when operating at a higher temperature... so long as it isn't TOO high. Without a thermostat, the coolant constantly circulates through the radiator and cools as much as the radiator will allow.
A cooling thermostat only will be normally open, closing on the rise of temperature. A Heat only thermostat will be a normally open, close on the fall of temperature.
The thermostat tries to control the heating and cooling in you home to maintain a comfortable or energy efficient temperature.
Not sure what you mean exactly....but a thermostat triggers your heating/cooling system on and off, thereby maintaining whatever temperature to which you have it set.
When 1990 Honda is running cooling fan does not come on but comes on when engine is off and I thermostat and temperature switch changed?"
The sensor on the thermostat housing is a cooling fan switch. Cooling fan switch closes the circuit to engage the cooling fan(s) when the optimum temperature is reached. When not replaced, cooling system fans will either remain continually "on" or not function causing the engine to overheat, internal engine damage and/or temperature light illumination.
There are two thermometers in this kind of thermostat. The one in the cover displays the temperature. The other, in the top layer of the thermostat, controls the heating and cooling systems.
Yes, a thermostat opens and closes in response to the temperature in the cooling system under normal conditions. If it is sticking it can cause fluctuations in the radiator coolant temperature.
It regulates the temperature of the water in the radiator and tells the fan when to switch on to start cooling or to switch off if its too cool. Engines have an optimum running temperature, and the Thermostat helps keep it at that.
Auto cooling is turning on and off automatically to maintain a constant temperature set on a thermostat.
The thermostat for the cooling system can be found on the front of the engine. You can follow the bottom radiator hose to the thermostat housing. The thermostat will be within the thermostat housing.
If you follow the top radiator hose from the radiator you will see where it connects to the engine cooling thermostat housing on top of the engine intake manifold . The engine cooling thermostat is under the thermostat housing
There is an engine temperature sensor that operates the cooling fan.