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car does not heating up e92 320d
Hello everyone i have an e92 320d n47d20a. I'm having a problem with the car, I had to replace the water pump because I lost water and I also changed the thermostat. Now the car doesn't heat up and thinking it would be the thermostat because it stayed open I ordered a new one and I changed it but it still doesn't heat up (Before i did the water pump and thermlstate challenge the car was heating up) what I didn't change was the thermostat box. Is it possible that what is failing is the thermostat box? And what is the function of the thermostat box?
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