Heater problems

[red240sx sr20det]

I had my sr swap and my heat worked all summer and then it stoped it only puts out heat when my car starts to move so when the motor is putting out power i was thinking it was my water pump or my thermostat just would like your opionion on it

[Onizuka]

Maybe your heater/ac fan stopped working. Air will go through the heating system when the car is moving because of the "ram air" affect on the air pickup underneath the car.

If you definatly hear the fan going, perhaps you have a coolent leak. Coolent runs under pressure so it can hold more heat before it boils. If you have a leak, the heater wont work as good. I had a problem like this.

[Henry G]

Sounds like you'll have to just check the system over. It could be many things.

[VitaminT]

You may also want to make sure your blend door is functioning. Just slide the temp slide back and forth a few times when the car is off and you should heard the door flap under the dash.