2001 Nissan Sentra Q&A

2001 Nissan Sentra Question: HEATER

I TURN ON THE HEATER BUT I JUST GETTING COLD AIR. CAN SOMEONE TELL ME WHAT IS THE REASON OF THIS HAPPENING. THANKS. -
Answer 1
There are several possible causes worst case the heater core (radiator) behind the dash could be restricted or plugged up, the heater control cable may not be opening the heater control valve, get a friend to operate the heater control knob from hot to cold cold to hot, look at the rear of the engine compartment for smaller diameter maybe 3/4 of an inch hoses attached to a heater control valve ensure as the heater control knob is turned from hot to cold the valve operates fully.. When you are driving after 10 minutes is the temperature gauge in the middle of its range if it only 25% of the way u the gauge the engine thermostat is "stuck" open and it will not allow the coolant to get hot enough to produce heat in the car. -
Related Items:
...he faster i go the hotter it gets.i'v put a new thermastat in,a new water pump.flushed out the heater core and the radiator looks like new.what can i do next?
...the car until I drive at hyw speed then there is lots. Car does not overheat and I flushed the heater core out with a garden hose and it was clean. Thermostat is new and the rad has also been flus...
Cable to door working properly. Can somone offer somethong to try?
I have a 2001 Nissan Sentra that keeps showing a P0140 DTC. I was intitially getting a code for...
...t it doesn't run rough and no white smoke from exhaust. Also, not sure if this is related, but heater blows cold air only and hoses to heater core stay cool. Any help is appreciated.