heater malfunctioning HELP

[thetalker1255]

I can let my quest 2000 idle for 15-20 minutes and have the heat turned on , but it will still blow out cool air. As soon as I put my foot on the gas pedal and accelerate I get hot air; foot off---cool air. This is very frustrating in the cold winter. Any ideas? A mechanic has already flushed and filled the antifreeze and checked all the vents.

[kellybo01]

The issue may be the impellors in the water pump... they get worn and will not push the water through your system unless the accelator is pushed.... just a guess....

[FixUrNissan]

Originally Posted by thetalker1255

I can let my quest 2000 idle for 15-20 minutes and have the heat turned on , but it will still blow out cool air. As soon as I put my foot on the gas pedal and accelerate I get hot air; foot off---cool air. This is very frustrating in the cold winter. Any ideas? A mechanic has already flushed and filled the antifreeze and checked all the vents.

Double check coolant system for leaks, replace any needed components found leaking. I would Double check you don't have any air pockets also . Air pockets could give you same symptom especially if you have rear heat.

[dzus]

I would bet my mother-in-law that it's air in the coolant system.