Question about 1988 Jeep Wrangler

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Not enough heat coming out of the heater of 1988 2.5L Jeep Wrangl

I already changed the coolant and put 195degree thermostat. The heater outlet hose from the engine to the heater core gets hot - after 5 minutes
running. The heater produces not too hot out of the dash board or out to the floor. Found also, the larger hose from the heater core toward back or return heater hose to the engine was more colder. Does it mean I have a problem with heater control valve or I have a partial clogged heater core ? And if I have a partial clogged heater core,.. is it possible I can reverse the flow of coolant to release the clog inside the heater core? Thank you very much for what ever opinion or helping information to me. Oscar

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It sounds to me your heater core is plugged. you can try to back flush it,being this vehicle is twenty yaers old,i would say to replace it

Posted on Dec 15, 2008

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