Spn 1548 5 Hvac Duct Temperature
Use the dash slprtemp switch to vary sleeper temperature from warmest setting to the coldest setting. Webmar 24, 2018 · could be hvac related error. I assumed the duct sensors might be bad so i replaced both of them located on passenger side underneath the dash. Source addresses and dtc descriptions are presented in plain text. Websuspect parameter number (spn), failure mode indicator (fmi) and occurrence count numbers are listed.
Use the rear hvac control panel blower switch to raise and lower. Webdtc/light spn fmidescription possible causes diagnostics 3 fmi spn 520210 6 blower output short circuit blower relay failure or relay enable signal from system controller. Still getting air in the sleeper but now the fan level 8 (max) is more. Webhvac control head temperature mix dm1 hvac temperature door stuck, defective door actuator, or open/ shorted circuit 1200_b11 to temp actuator pin a, or 1200_b12 to. Mine just came on as well the same time i lost all air in the cab. Webi have a hvac duct temperature code spn 1548. Webthe system uses constant outlet temperature control (cotc) to provide discharge air temperature out the ducts that has a stable temperature based on a reference point for.
