Hi
I have an accord 2014 v6. I recently change transmission fluid and was checking a level on a hot engine
and I notice that house that goes from the bottom of radiator in to thermostat is cold (after half an hour drive)
External reservoir for coolant was empty, but radiator was fool (on a cold engine)
I fill reservoir but house is still hold on a hot engine.
Engine temperature gage seems fine, slightly less than half, heat is also working.
Do you think its a stuck thermostat or something else?

Thanks