Heater is not blowing hot air on 1996 Dodge Stratus

My heat is barely blowing hot air. It's just warm enough to defrost the windows if I leave it run for awhile. If it sits idle for 10 minutes or so it will blow hot air but I start driving and it gets cool again. I checked the thermostat and it is fine. Need some help please!

by in Pontiac, MI on January 19, 2010
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3 answers
ANSWER by , January 19, 2010
There is a temperature blend air door, it is operated by a cable attached to the heater control lever. Check the other end of the cable, there is a plastic lever that sometimes breaks, if it's broken, it will need to be replaced.
ANSWER by , March 20, 2010
Check your water pump.
ANSWER by , February 18, 2011
mine done this and i took heater hoses off and backflushed heater core until it was clean and it works fine now