heat only blows hot for a few seconds
hello. im new to this forum. i'm having problems with the heat in my 2000 taurus. it blows decently hot for about 5-10 seconds and then starts cooling down. i've checked everything i know to check so far. thermostat, heater core, hoses, temp control switch, etc.. the temp blend door seems to be working alright. it looks like its moving the full range. ive almost got the dash completely out to check the actual door in the heater box. anybody have any ideas?