Ours had pink stuff from the factory, the dealer flushed the system for us when we picked it up. Last winter we ran pink through it and it was fine in spring so we did the same this time as well. I sat on the floor and kept pressing the test button until pink came out into the tray, it took about 5 minutes.
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Russ & Maureen
Victor the Boxer
2019 3811MS - 2012 F350 Dually
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