2001 Nissan Xterra Q&A

2001 Nissan Xterra Question: i only get heat when i accerlate

i replaced the thermostat the heat censor and put all new antifreeze in the system -
Answer 1
Possible air in system, low coolant level, defective water pump impeller or restricted heater core. Does the temp gauge go up when at idle for an extended time? -
Answer 2
I agree with wetry ,I would try bleeding the system first -
Answer 3
or blend door issues -