my 2004 LS8 will not blow heat and its been below freezing all week. Just replaced thermostat, radiator, and water pump. what could it be?

Asked by Jan 06, 2016 at 05:52 PM about the 2004 Lincoln LS V8 Sport

Question type: Maintenance & Repair

2 Answers

20,795

check for a vacuum line/hose /off/broken...

58,255

There may be a heater control valve that is vacuum operated in a heater hose may be bad, or there is still air pockets in the cooling system that would need to be purged.

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