Heater Is Not Working Properly


hntr45

10+ Year Member

Joined
Sep 27, 2014
Messages
29
Points
1,601
Vehicle Year
1997
Transmission
Manual
Hey, so I have a 1997 xlt with the 2.3l. I keep having troubles with the heater in it. Last winter it was working like a champ, but now it doesn't seem to want to work right. I have fixed the blend door, backflushed my heater core, checked the vacuum hoses, and replaced the heater control valve. It will blow hot air for a few minutes that isnt too hot, then it starts blowing cold air. I felt the hoses when I got home today when it was working then randomly stopped and the in hose was hot but the out hose was cooler. I can't understand why because the control valve definitely opens up and the heater core has tons of flow. Am i just missing something?
 
Remove the heater control valve...

SVT
 

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