I priced the heater core from Napa at $89. The local garage priced me labor at $425. they said 3days worth of work. Prices vary, but this shop is usually pretty cheap.
The reason for the $425 is because they might have to lower the dash in order to get the core housing..
The blower on the back heater may need to be replaced on the 2000 Ford Winstar.
heater windstar ford
Heater circuit fault
Sounds like the heater core may be plugged up or the heater damper door is broken. See "Related Questions" below for more
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I paid $490 to have the water pump replaced.
have the heater core cehecked out
repair the heater hose.
15.0 liters ( 15.9 quarts ) according to the 2001 Ford Windstar Owner Guide - cooling system capacity with rear heater
The most common reason the heater is blows cold air on a 1999 Ford Winstar is a bad thermostat or blocked heater core.
the heater pipe is not working the dealer only sale this part two hose run from this.
I just had my water pump replaced on my '96 Windstar at a Ford dealer and it cost me $575.