What’s your radiator outlet temp? With the thermostat closed the outlet temp sensor reading should stay at what it started at (matching outside temp) a small increase over a period of time may be acceptable if stationary with revs on but if driving I wouldn’t expect it to increase until the thermostat starts to open.
Your use of both degrees c and fahrenheit make it difficult to follow the readings you have taken.
Your use of both degrees c and fahrenheit make it difficult to follow the readings you have taken.