Q: Car heats up but only blows out cold air and the temp. Goes up then back down. Radiator is full of anti freeze

asked byFebruary 14, 2017

I have checked my radiator, it's full the temperature gage shows the car heats up but then goes back down the heater doesn't get hot could that be the thermostat bad

My car has 12000 miles.
My car has an automatic transmission.

在恒温器打开之前,发动机温度必须高于180至190度,然后将加热的冷却液流向加热器芯。如果您的发动机不保持稳定的温度,则可能需要更换恒温器。如果温度在约190度的水平上稳定,则应检查进入防火墙进入加热器芯的两个加热器软管,以查看它们是否很热。如果是它们,则需要检查内部的A/C加热器盒上的内部温度控制执行器,以查看它是否移动以增加或减少温度控制。更换执行器是它不会随温度控制而移动。

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