Hi,
In my Mazda 6 2020 2.5 petrol I noticed the engine temperature after warming up ( 90 degrees C ) drops to half the scale ( 70 degrees C ) after turning on the air conditioning, regardless of whether AC/AC ECO or heating only. There are no errors in the ECU. The oil level does not increase/decrease and it is clean under the cap. The coolant level does not increase either and the fluid is clean. I have not noticed any coolant leaks.
From the temperature of the lower radiator hose, I conclude that the thermostat is opening. I also noticed that the coolant from the reservoir does not flow back into the system. The thermostat was replaced at the Authorized Service Center, the cap is also new and the system has been bled.
Where to look for the cause?
In my Mazda 6 2020 2.5 petrol I noticed the engine temperature after warming up ( 90 degrees C ) drops to half the scale ( 70 degrees C ) after turning on the air conditioning, regardless of whether AC/AC ECO or heating only. There are no errors in the ECU. The oil level does not increase/decrease and it is clean under the cap. The coolant level does not increase either and the fluid is clean. I have not noticed any coolant leaks.
From the temperature of the lower radiator hose, I conclude that the thermostat is opening. I also noticed that the coolant from the reservoir does not flow back into the system. The thermostat was replaced at the Authorized Service Center, the cap is also new and the system has been bled.
Where to look for the cause?
