ive got a 01 dodge 2500 V10 4x4 and ive repaced the thermostat 3 times and the heater will work for a day or so then it will not work and the gauge will not go off cold ive checked the level of coolent and got all the air out any help would b nice


thanks

 

i just put another in and the truck warrmed up to 210 and then the heater worked, after 10 min went back to 130 and no heat

 

Have you checked/changed the radiator cap ???