I have 2012 cascadia and this code is on my dash without check engine or warning lights can someone help me find a answner
Sys 25 1548 fml 5
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by cwaldo, Mar 23, 2018.
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Mine just came on as well the same time I lost all air in the cab. Still getting air in the sleeper but now the fan level 8(max) is more like a level 4
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SPN-1548 FMI 5 “HVAC DUCT TEMP”.
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So I have the sys 50 son 1548 fail 05 code as well but my blower wont shut off please help
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