The performance of the thermostat can be judged by the following faults.

　　節溫器壞了通常有兩種癥狀

　　There are usually two symptoms when the thermostat breaks down

　　如果節溫器不打開，水溫將顯示在高溫區域的溫度計上，但水箱風扇不轉。

　　If the thermostat is not turned on, the water temperature will be displayed on the thermometer in the high temperature area, but the fan of the water tank will not turn.

　　如果汽車節溫器不關閉，水溫會緩慢上升，尤其是在冬季，水溫仍處于低溫區10-20分鐘，怠速較高。

　　If the car thermostat is not closed, the water temperature will rise slowly, especially in winter, the water temperature is still in the low temperature zone for 10-20 minutes, idling speed is higher.

　　汽車的節溫器壞了

　　The car's thermostat is broken.

　　節溫器故障診斷方法:

　　Thermostat fault diagnosis method:

　　冷車啟動后，立即打開散熱器噴嘴蓋。如果散熱器中的冷卻水是平靜的，說明節溫器工作正常;否則，這表明節溫器不能正常工作。這是因為當水溫低于70℃時，節溫器膨脹管處于收縮狀態，主閥關閉;當水溫高于80℃時，膨脹管膨脹，主閥逐漸打開，散熱器中的循環水開始流動。

　　After the cold car starts, open the radiator nozzle cover immediately. If the cooling water in the radiator is calm, it means that the thermostat is working normally; otherwise, it means that the thermostat is not working properly. This is because when the water temperature is lower than 70 C, the expansion tube of the thermostat is in a contraction state and the main valve closes; when the water temperature is higher than 80 C, the expansion tube expands, the main valve opens gradually, and the circulating water in the radiator begins to flow.

　　當水溫指示器低于70℃時，散熱器進入水管內若有水流，水溫升高，表溫調溫器主閥關閉不嚴，使冷卻水循環過早。

　　When the water temperature indicator is lower than 70 C, if the radiator enters the water pipe, the water temperature rises, and the main valve of the surface temperature regulator is not closed tightly, which makes the cooling water circulate too early.

　　如果節溫器沒有壞，可以看到水溫升高后是否有水從發動機出水管流出，并且可以感覺到水流通過管子。如果沒有感覺到水流，那么水泵或發動機的水循環就會被堵塞，這就更麻煩了。

　　If the thermostat is not damaged, you can see if there is water flowing out of the engine outlet pipe when the water temperature rises, and you can feel the water flowing through the pipe. If there is no sense of water flow, then the water circulation of the pump or engine will be blocked, which is even more troublesome.

　　節溫器故障診斷方法:

　　Thermostat fault diagnosis method:

　　一種確定節溫器是否損壞的方法

　　A Method for Determining the Damage of Thermostats

　　當發動機開始運行時，如果水箱上部水室進水管仍有冷卻水流出，則說明節溫器的主閥不能關閉。當發動機冷卻水溫度超過70℃時，水箱上部水室進水管沒有冷卻水流出，說明溫控器主閥不能正常打開，需要維修。

　　When the engine starts to run, the main valve of the thermostat can not be closed if there is still cooling water flowing out from the intake pipe of the upper chamber of the water tank. When the cooling water temperature of the engine exceeds 70 C, there is no cooling water flowing out from the intake pipe of the upper water chamber of the water tank, which indicates that the main valve of the thermostat can not be opened normally and needs to be repaired.

　　節溫器檢測可在車內通過以下方法進行:

　　Thermostat detection can be carried out in the car by the following methods:

　　發動機起動后檢查:

　　Engine post-start inspection:

　　打開散熱器噴嘴蓋。如果散熱器中的冷卻水是平靜的，這意味著節溫器工作正常。否則，這意味著節溫器不能正常工作。這是因為當水溫低于70℃時，節溫器膨脹管處于收縮狀態，主閥關閉;當水溫高于80℃時，膨脹管膨脹，主閥逐漸打開，散熱器中的循環水開始流動。當水溫表顯示低于70℃時，如果有水進入散熱器管道，水溫為暖，說明節溫器的主閥沒有嚴格關閉，使冷卻水循環過早。

　　Open the radiator nozzle cover. If the cooling water in the radiator is calm, it means that the thermostat works properly. Otherwise, this means that the thermostat is not working properly. This is because when the water temperature is lower than 70 C, the expansion tube of the thermostat is in a contraction state and the main valve closes; when the water temperature is higher than 80 C, the expansion tube expands, the main valve opens gradually, and the circulating water in the radiator begins to flow. When the water thermometer shows below 70 C, if water enters the radiator pipe, the water temperature is warm, indicating that the main valve of the thermostat is not strictly closed, so that the cooling water circulation is too early.