Why would my 09 Nissan Pathfinders ac blow hot then cold randomly. Also my heart was doing the same until I blead the lines. I let it idle yesterday to see if there was any kind of cycle of when the AC worked. The water started running out the over flow and when I drove it it ran hot. I let it cool filled back up with water and the heater is acting up again and also I can’t drive more than 5 miles without it reading hot. This is the crazy part. When hot temp shows the heat wont work then temp goes down and sounds like clicking under the dash while the clicking is happening the heat will work and temp is normal. Then it does all over again?
I blead the lines again after all the running hot and there was a huge air bubble pocket. So the heat is back right but haven’t checked the air yet. It was kinda cool yesterday so haven’t really had a chance to see if it will stay on. I will see today. No more running hot though. My main thing is to figure out what’s up with the air blowing cold then hot randomly?