Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLINCOLN2008NAVIGATOR RWDREPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEXCLIMATE CONTROL SYSTEM DTCSHVAC MODULE -DUAL AUTOMATIC TEMPERATURE CONTROL (DATC)
2008 Lincoln Navigator RWD
HVAC Module -Dual Automatic Temperature Control (DATC)
2008 Lincoln Navigator RWDSECTION HVAC Module -Dual Automatic Temperature Control (DATC)
HVAC MODULE -DUAL AUTOMATIC TEMPERATURE CONTROL (DATC) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Perform Test |
|---|---|---|
| B1003 | Mode Door Short/Failure | Go to Pinpoint Test H . |
| B1251 | Air Temperature Internal Sensor Circuit Open | Go to Pinpoint Test A . |
| B1253 | Air Temperature Internal Sensor Circuit Short to Ground | Go to Pinpoint Test A . |
| B1255 | Air Temperature External Sensor Circuit Open | Go to Pinpoint Test B . |
| B1257 | Air Temperature External Sensor Circuit Short to Ground | Go to Pinpoint Test B . |
| B1676 | Battery Voltage Out of Range | Go to Pinpoint Test W . |
| B2266 | LH Blend Door Failure or Short | Go to Pinpoint Test M . |
| B2267 | RH Blend Door Failure or Short | Go to Pinpoint Test M . |
| B2268 | Steering Wheel Control Switch Circuit Open | Go to Pinpoint Test F . |
| B2269 | Steering Wheel Control Switch Circuit Short to Ground | Go to Pinpoint Test F . |
| B2426 | Passenger Solar Radiation Sensor Circuit Open | Go to Pinpoint Test C . |
| B2427 | Passenger Solar Radiation Sensor Circuit Short to Ground | Go to Pinpoint Test C . |
| B2783 | A/C Humidity Sensor Circuit Short to Ground | Go to Pinpoint Test D . |
| B2784 | A/C Humidity Sensor Circuit Open | Go to Pinpoint Test D . |
| B2795 | Driver Solar Radiation Sensor Circuit Short to Ground | Go to Pinpoint Test C . |
| B2796 | Driver Solar Radiation Sensor Circuit Open | Go to Pinpoint Test C . |
| B2826 | Front Evaporator Temp Sensor Circuit Failure | Go to Pinpoint Test E . |
| B2827 | Front Evaporator Temp Sensor Short to Ground | Go to Pinpoint Test E . |
| B2916 | Auxiliary Blend Door Failure | Go to Pinpoint Test T . |
| B2917 | Auxiliary Mode Door Failure | Go to Pinpoint Test U . |
| B2918 | Auxiliary Temperature Input Circuit Open/Short to Ground | If the vehicle is not equipped with a center console and rear auxiliary climate controls, ignore the DTC and continue diagnostics. If the vehicle is equipped with a center console and rear auxiliary climate controls, go to Pinpoint Test V . |
| B2919 | Auxiliary Blower Motor Speed Input Circuit Open/Short to Ground | If the vehicle is not equipped with a center console and rear auxiliary climate controls, ignore the DTC and continue diagnostics. If the vehicle is equipped with a center console and rear auxiliary climate controls, go to Pinpoint Test V . |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.