Low on coolant.
Stuck open thermostat.
Plugged heater core.
Temp blend door inop.
it is blocked and needs to be flushed out
What do you mean by "has no heat"? No air blowing out, blowing out cold air when heater is on, blowing nothing at all? Heater not turning on? What specifically is happening?
The most common reason the heater is blows cold air on a 1999 Ford Winstar is a bad thermostat or blocked heater core.
One reason your home electric heater is blowing cold air is the heating elements are burned out. A bad thermostat may also be the problem.
Low coolant and a clogged heater core are possibilities.
faulty control valve on heater or air in the lines
Maybe its broken. Or maybe you pressed the AIR CONDITIONING
Probably blocked heater matrix. Best thing to do is flush the cooling system with the best stuff you can get.
You may need to replace your Thermostat or your Heater Core.
Most likely your pilot light is out
because u pooped in it
did you check the heater core because my truck did that and that was what was wrong