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Have no heat when you turn on heater in your 1999 ford expedtion?
Wiki User
∙ 15y ago
No heat or no blower motor...
it makes a difference on what you look for.
No heat means no hot water making it to the heater core... many fords have a valve that controls hot water flow to the heater core. It could be stuck or the vacuum line that controls it could be broke or off of the valve. Find your heater hoses that run up to the firewall. Smaller hose about the size of a broom handle. When the motor has been running and is warm. See if the heater hoses are hot. If they are not. Then your not getting hot water to the heater core...
Fan not blowing...
could be something in the fan. Or the fan could be bad. Or the controller for the fan could be bad... use a test light and probe the wire going to the fan... "with power on and the switch set to high for the fan." See if you're getting power to the fan. Yes power and now fan then the fan has gone bad. If there is no power trace back. Check fuses. Look for the reason that you're not getting current to the fan. Maybe the blower motor switch is bad.
Want to force the fan to run. Run you a jumper wire to the fan wire from a voltage source. Connect to a source that is only one when the key is on. And every time you star the car you will have the fan running full speed. Better than no heat. Until you can get a chance to figure out what's wrong or find someone that can help you fix it.
By the way. I assume you made sure the cooling system was full? Low water level in radiator can reduce the amount of heat you get out of the heater.
Good luck
Wiki User
∙ 15y ago
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