2002 Nissan Sentra "heater blows cold air parked" Questions

...overheats and heater blows hot air in park but when put in drive it blows cold air have repalce the thermostat Might try a reverse flush of the cooling system. Might reverse flush the heater core

...cold air, no heat. (for weeks now). I paid for new thermostat, water hose, radiator. It's had a coolant flush. The mechanic is baffled. Please help. Assuming they checked the controls under the dash ...

...heater hose until pressure from the water pump blows thru it as the engine speeds up. Park on an incline, open the radiator cap, run the engine until the thermostat is open, turn the heater on, crack ...

...heater blows cold air. sitting with car running the temp slowing creeped up to 208 and air got warm but as soon as we started driving a when driving coolant temp reads 165 and heater blows cold. when ...

...park with the car running and heat still set on it blow cold air If your engine temp reads warm then your heater core is clogged. Try flushing the system. If it reads cold then u need a new ...

...heater blow cold air? you mean why doesnt it blow cold air most likey your blower motor is out and there is a litttle chip behind it call the blower motor resistor change that to if your gonna get a ...

...heater will put out warm air then after a minute or 2 it turns to cold air you restart the car at stop sign and will throw heat again for min. or 2 then back to cold every time you restart the car it ...

...Heater blows warm air while vehicle is moving. hi there it sounds like the matrix has gone it is at the back of the centre panel at the bottom when the engine is hot touch the matrix to see if its ...

...3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest to flush the heater

heater blows hot air as long as the car is in motion when stopped or parked the heater only blows cold air sounds like a circulation issue, can be one of three things, the heater core starting to plug