1997 Honda Civic Q&A

1997 Honda Civic Question: Heater works & engine temp good when parked,& driving no hot air & car runs cold

At speed I have no heat or minimal heat and engine temperature is cold. When I'm parked the engine temperature warms and I get hot air? What is causing this? -
Answer 1
It's likely the thermostat is weak. Try replacing that first. -
Comment 1
I tapped where the thermostat is with the butt end of a ratchet and it works a little better but not great. So more than likely is the thermostat right? -
Answer 2
ck coolant level to start with -
Comment 1
Coolant is full and checked it's good to -10 -
Answer 3
It's common for the thermostats to stick in the open position on these engines. Remove the thermostat and inspect it. -