timberjack

Ok thanks all it is about winter over here in Missouri so will check this all out.

I have a 89 Comanche and the heater blowes hot for about 10 sec then turns cold. Turn the fan off and it takes about 5 min to get hot again so turn blower back on and same thing. So what am i doing wrong. I made sure the cable driven flow valve was open too. Heater hoses are also not hot going into the heater core.????