heater blowing luke warm air, blows strong just not hot on 1997 Chevrolet Camaro

heater blowes strong but no hot air. I hear the door opening and closing

by in Hayward, CA on January 22, 2014
2 answers
ANSWER by on January 22, 2014
Thermostat may need to be replaced. Heater core 'itself' may be restricted and needs flushing.
ANSWER by on January 23, 2014
CK COOLANT LEVEL 1ST BEFORE STARTING ANY REPAIRS. IF COOLANT IS LOW CK FOR LEAKS