Work through the coolant bleeding procedures - it may take a time or two to effectively remove all air from the system.
See "Related Questions" below for more
no no
have the heater core cehecked out
Once a heater core starts to leak, the only remedy is to replace it.Luckily it appears to be a pretty straight-forward job on the Windstar - the heater core is at the bottom of the center of the dashboard - remove the ductwork and some of the trim pieces to expose the heater core compartment.Of course, this is after draining the engine coolant and disconnecting the heater hoses in the engine compartment.See "Related Questions" below for more...
Heater core may be air bound and have to be bled Heater core may be plugged or restricted Thermostat may not be opening allowing coolant flow to core
Need the correct model of vehicle you have and you cannot repair a heater core...........
Suspect a plugged up heater core then.See "Related Questions" below for more
Feel the heater hoses in engine compartment if one is hot and other cool try flushing heater core.
A blocked heater hose could cause a leak. A stopped up heater core could as well. Or the connector in the Windstar could be cracked.
The most common reason the heater is blows cold air on a 1999 Ford Winstar is a bad thermostat or blocked heater core.
In addition to the front core in the dash, if the van has the optional rear climate controls there will be a second one back there.See "Related Questions" below for lots more about Windstar heater cores and climate controls
The heater core is usually your last resort. So now start from the end to the beginning, core, thermostat, flush, hose, fluids. Follow the trail and your bound to find your answer.
In all the Windstar models, basically removing just the lower heat ducts will provide clear access to the heater core.See "Related Links" below for the Autozone.com online illustrated repair guide for replacing the heater core(s) on 1999-2003 WindstarsNOTE: Autozone now requires free registration to access the repair guides. More than worth the extra effort for these photo/illustrated instructions.Note: the procedures are essentially the same for all model years of the Windstar mini-van.NOTE #2: for a sense of pricing, Autozone has the front for around $55Autozone has an on-line detailed & illustrated repair guide, including the heater core replacement procedures.See "Related Links" below on this page.NOTE: Autozone now requires free registration to access the repair guides. More than worth the extra effort for these photo/illustrated instructions.The good news for the Windstar is the entire dashboard does NOT have to be removed in order to replace this heater core! Seems most vehicles for many years make this a huge project - but the Windstar looks to be much less involved.Sounds like you heater core I would not try to fix it yourself as it could be a big job, take it to your local rad shop would be the best.AnswerReplacing the front heater core in the Windstar is much easier than a sedan type vehicle where the dashboard needs to come out to access the core. In the Windstar, basically removing just the lower heat ducts will provide clear access to the heater core.See "Related Links" below for the Autozone.com online illustrated repair guide for replacing the heater core(s) on 1999-2003 WindstarsAt the bottom of the center of the dashboard.It is relatively easy to get to and repair/replace - simply remove the lower ductwork and trim pieces.Answer1997, 1999 Ford Truck Windstar 3.8 Heater CoreInspect | ReplaceDrain the cooling systemHeater HousingThe heater housing is usually under the dash and must be removed to gain access to the heater core. Procedures for replacing the heater core vary with the year, make, and model of car. It is therefore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.The heater housing is disassembled to get to the heater core.Heater Core Remove the access panels(s) or the split heater/air conditioning case to gain access to the heater core. Remove the heater coolant hoses. Remove the cable and/or vacuum control lines (if equipped). Remove the heater core securing brackets and/or clamps. Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing. To reinstall the heater core, reverse the removal steps. When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.