I have a 2004 freestar


I got no heat for some time now I replace the blend door motor. now I would like to flush the heater core.

How to i get to the heater hoses. do i go under the van. or do i remove the windshield wiper arms and the panel under it to access the hoses.

Thank you

 

Leave the whole system intact and power through everything with a garden hose with a necked down nozzle hooked up to a hose and blowing into any hose you can find and out a hose or rad cap opening at building pressure. Flow for 45 minutes.

Are you sure that no or dimmished coolant flow through the core is the problem?
Try this.

Find the coolant hose going into and coming out of the heater core.
Have the engine up to normal temp.
Heater fan on high, maximuim temp dialed up.
Blower open to fresh air. Not recirculated.
Grab hold of both hoses as close as you can get to the core.
Or use two contact therometers.
It won't be very close but I'm afraid you'll have to muddle on.
Is there a notible temperature difference? Even a little temp difference?
Hot going in, cooler coming out?
Yes? O.K. The core is transferring coolant through it.
But no heat? The heated air is not ducted into the cabin.
No? Core is not transfering because the coolant is not transversing thru the core...
Or air is not ducting/blowing through the core.

Clean the core? Why not the whole system? Why would the core be plugged? I'm coming up on 300,000 with factory coolant still on board. No plug.

Try this for a few thousand miles with antifreeze if your in cold weather.

skip.

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