jhomer42

Hi there all and thanks for your input.

My heater isn’t running as warm as it used to. Coolant looks ok. Any other ideas of how to improve heater performance?

Thanks

koreywill

A few things come to mind: 1) Check to see if your coolant level is low. 2) Check your coolant temperature when fully warmed up to see if it's getting hot. If it's not, you may have a thermostat stuck in the open position. 3) If the coolant has not been changed for a long time you may have a partially plugged heater core. I'm sure others will chime in. For other threads with a similar problem, look here: https://www.clublexus.com/forums/es-...-cold-air.html
There are a lot of threads about heating problems. Use the search feature and you may find your answer if it's not above.
Good luck and let us know what you find.