1996 Jeep grand Cherolee Heater

Tiny
JIM PATTERSON
  • MEMBER
  • 1996 JEEP CHEROKEE
  • V8
I have a heater that works but doesn't get hot. Water circulation is OK but acts like a control door or temp control valve is not operating fully. Where is the heat temp control door or valve.
Friday, December 3rd, 2010 AT 4:53 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both too hot to hold. If they are.

The heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
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Friday, December 3rd, 2010 AT 4:58 PM

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