1993 Ford Bronco no heat

does the engine heat up like normal?

i had the same problem and ironically found it by not looking for it there is a vacuum line that runs to the passanger side of the truck up by the radiator mit and weather check and leaking badly replaced it and boom my heat was back come to find out ford ran a vacuum control valve out the intack you can follow one of your heater core lines back and find it it you have a vacuum leak its not opening the vavle. giving you little or no heat! just somthing to look for!