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Re: F 350 issue not cooling while vehicle moving
Try checking at 1000 RPM and see what pressures are doing. Also is the engine fan electric of cutch fan? Sometimes they go bad and need replacing. If fan goes bad when moving slow in traffic or up hills it will impact A/C operation. Likewise low refrigerant may appear in normal range at idle but not above. If freezing up definitely I slow on refrigerant or a restriction may be present somewhere. Could be a number of things but these are easy checks before getting into the expensive items.
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David
"Hartley, you always have time to do it over, but never time to do it right."
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