ive had to fill coolant twice now in a month
I have had to add coolant twice now in a month in my 04 jeep grand cherokee. And my heat will blow cool air on drivers side and warm to hot air on passenger side. Ive replaced the blower motor resistor. Could it be the wiring?
Your probably just low on coolant, and since you have to add coolant regularly there is a leak. Fix the leak and properly bleed the system of air and you should have heat again and avoid overheating the engine.
I think he is right you are losing coolant somewhere in the system it might be external to the engine and chassis but it might be going into the engine oil or trans depending upon the vehicle find that leak it shoulnt be to hard good luck
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