Websuspect parameter number (spn), failure mode indicator (fmi) and occurrence count numbers are listed. Source addresses and dtc descriptions are presented in plain text. Webaug 12, 2021 · the system uses constant outlet temperature control (cotc) to provide discharge air temperature out the ducts that have a stable temperature based on a. 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. Webi have a hvac duct temperature code spn 1548. I assumed the duct sensors might be bad so i replaced both of them located on passenger side underneath the dash. 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. Use the dash slprtemp switch to vary sleeper temperature from warmest setting to the coldest setting. Use the rear hvac control panel blower switch to raise and lower. Webmar 24, 2018 · could be hvac related error. 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. 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.
