Sounds like it's stuck in the closed position
there are only 2 bolts on thermostat housing. if housing doesnt come loose when blots removed, just knockwith a hammer . dont need to hit hard, just enuff to knock it loose
Replace the thermostat.
could be a sticking thermostat.
Ford doesnt have a 5.7l. On a 5.8 it is behind the thermostat housing at the front edge of the lower intake.
may be a bad thermostat
Thermostat and/or heater core may be defective
ford doesnt have a ram pickup ram is dodge
More then likely you need to replace the Thermostat.
OPen the trunk or hood, pull out the panel and replace the bulb... If that doesnt work, check your fuses
get stung and then you can get it but get it by the bottom and i think it doesnt sting
Sounds like your thermostat could be stuck open.
probably its wrong thermostat and it doesnt open. take it out and run car without it