I had the heater repaired last year because it would not come on but the
air would. It has worked for a little while. Now that the weather is
getting cooler at night, I have begin to turn on the heat an nothing
happens. Only cool air blows.
This cost me a lot of money last year. I have a 1999 Chrysler Concorde and the repair was made at Pep Boys
Source: http://freeautomechanic.com/mechanic/forum/2011/05/1999-chrysler-lhs/comment-page-1#comment-2578
The most common cause for this issue is from a failed or sticking Blend door Actuator. It located deep inside the dash and usually runs at least 10 to 13 hours labor. Check to see if this is what you had replaced before and if you still have any kind of warranty left on the repair.
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