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

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?

by in Hebron, KY on January 07, 2014
3 answers 2 comments
ANSWER by on January 07, 2014
It's likely the thermostat is weak. Try replacing that first.
COMMENT by on January 09, 2014
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 by on January 07, 2014
ck coolant level to start with
COMMENT by on January 09, 2014
Coolant is full and checked it's good to -10
ANSWER by on January 13, 2014
It's common for the thermostats to stick in the open position on these engines. Remove the thermostat and inspect it.

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