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My heat works, but won't blow out on a 2000 Lincoln LS. Ive turned up the thermostat to the highest level and it still won't blow out, however when I put my had up to the vents I can feel the heat
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make sure you installed the themostat the right way and that it has the proper heat range for your vechicule.normally after installing a thermostat,you remve the rad cap and fill the radiator with antifreeze,then srart the car and wait till the themostat opens and prestone level falls.refill rad and put rad cap back on.turn on heater and you should have heat,if not have your rad cap tested to make sure it is holding the proper pressure.your antifreeze mixture should be 50\50.
Check the 'heater control valve,' which is attached to the heater hose line under the hood. If it is malfunctioning, it will prevent hot coolant from reaching the heater core, with the result being no heat. This is a $30 part, usually not too tough to get at, although I've never changed one on a Lincoln.
You also could have air in your coolant system. You can't just add coolant on these models after you drain the system or let it run low on coolant. The degas bottles on these models also have a flaw, where they crack along a seam. Sometimes coolant will leak, sometimes not, depending on how high the crack is on the bottle. But what it is guaranteed to do is allow air into your system, which can cause havoc with overheating (air surrounds the thermostat so it doesn't open) and keep coolant from flowing, particularly through the highest point in the system: the heater core. There is a heater core bleeder valve attached to a line near the top of the degas bottle (next to the expension line up top) with a plastic, flathead srewdriver face. Turn the heat on high and run the system at idle for 5 minutes. Then open the valve and keep it open until a steady stream of coolant comes out. (It's like bleeding your brakes.) That will clear any air from the system and at least give you peace of mind that this is not your problem. Then run the motor at 2000 rpms, with the heat still on high, for about 5 minutes or until hot air starts coming out. Release the bleeder valve again until a steady stream comes out. Then let the system cool and check your coolant level and fill as needed. I'd pull the degas bottle and inspect it...should have been a recall.
- If temp guage reads normal, the lack of heat may be due to the Heater Control Valve. Located in front of the radiator. Lower passenger side. A real bugger to replace.
- The plastic cap just over the thermostat is key in re-filling the anti freeze and bleeding air.
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