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SAE J638

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SAE J638 2011 Edition, May 1, 2011 Motor Vehicle Heater Test Procedure
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Description / Abstract: This SAE Recommended Practice, limited to liquid coolant systems, establishes uniform vehicle heater test procedures. Both laboratory and complete vehicle tests are specified in this document. Required test equipment, facilities, and definitions are included.

Note— Defrosting and defogging procedures and requirements can be found in SAE J902, J381, J382, and J953.