Question about 1993 Jeep Grand Cherokee

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1993 jeep grand heat

My pos 1993 jeep grand cherokee has no heat..when i start it the display for the air controls reads...Er..then it goes away..the air only blows out of the front windshield and it stays cold...the box under the glove box gets hot and so do the hoses under the hood..i dont really know alot about cars and how they work..but it would be nice to have an idea of whats wrong before i go to a shop to have it fixed...any help?

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  • curt88 Jan 24, 2009

    its not the register cause i can still control the speed at which the air flows guess is the one of the other two,thanks alot



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There is three things that could be going on here, first the controls could be bad, secound it could be heater blend door acturator, and third it could be heater resister. i am thinking its the controls because you say it displays ER. on air controls witch i'am sure means error, if thats the case its not sending a signal to acturator to move the doors in the heater box, witch in turn will not let heat flow out into car. now i don't think its resister, witch only controls speeds of fan, sense you did not mention that in your question. it could be the acturator its a little electric motor on heater box that moves the doors in heater box, but it gets its signal from the controls on the dash. MONEY, acturator around $45.00, heater controls 150.00 to 200.00 resister around 20.00, and thats just parts this is just a guesstament just giving you an idea of the cost, thats if all three are bad witch i dought they are.

Posted on Jan 23, 2009


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