Q: no heat
on 2002 Nissan Altima

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
I just replaced the sensor and the heat started working just fine now I have no heat again but it blows out cool/warm air
(1) Answer
(1) Comments
what sensor???

check coolant level, check thermostat and see if the heater hoses are both hot.

did it overheat??? if it did, internal damage may have resulted.

I checked the coolant level and it was low so I added coolant and its warm now but now did not over heat. I changed the thermostat. And I changed some coolant package on the engine.