Question about 1999 Ford Explorer

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Heat gets cold after on for little bit

After the heat has been on for a little bit the air starts to get cold what could this be

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Sounds like deposits have built up in your heater core. You can try one of those cooling sytem flush kits from the parts store. It will have to be an acidic type. Make sure you let the vehicle run long enough to reach normal operating temperature so that the thermostats all open and run it with the heater turned on. After you flush out the system, You should only use distilled water and antifreeze to refill your system. I dont care what anyone tells you City water and well water are bad! Distilled water is easy to find they have it at Walmart, Giant. and just about all big grocery stores. Its right by the drinking water. If only Distilled water is used in a cooling system for the life of it, Deposits should never even form.

Posted on Feb 02, 2010

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Check you temp gauge. I should ree in the middle to 2/3 towrd the H. Open your hddo and see if BOTH of you heateer hoses are VERY warm. if one of them feels much cooler thatn the other,, you have a restriction of coolant flow. Possibly a plugged heater core. Start with this.

Posted on Feb 02, 2010

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