My wife has a 2001 Nissan ultima GXE with 89,000 miles. The car seems to run hot with the temp gauge reaching the “H” but never passes it, andwhen air conditioner is on it blows hot air; Then the car cools down it the air cools again, and this seems to happen all of the time.
Now, it’s been happening for at Least 3 months, during this time it has had a tune up, the radiator flushed & hoses, thermostat replaced & lastly the … Sensor has been replaced & still the same thing happens the car temp runs hot cold up then down. We are at a loss her and have run out of ideas. Any help please