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 MANUALSFORD2018EXPEDITION MAX LIMITED, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXDTC INDEX (ACCESSORY CHARGING - EXTERIOR TRIM AND ORNAMENTATION)CLIMATE CONTROL SYSTEM DTCSDUAL AUTOMATIC TEMPERATURE CONTROL (DATC)RHVAC CONTROL MODULE
2018 Ford Expedition MAX Limited, 4WD
RHVAC Control Module
2018 Ford Expedition MAX Limited, 4WDSECTION RHVAC Control Module
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| B10B8:63 | Push Buttons: Circuit / Component Protection Time-Out | This DTC sets when the buttons are held too long. ATTEMPT to clean buttons. CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test. If the DTC does not return, IGNORE the DTC and CONTINUE diagnosing other Diagnostic Trouble Codes (DTCs) or symptoms. If the DTC returns, INSTALL a new RHVAC Control Module. REFER to REAR HEATING, VENTILATION AND AIR CONDITIONING (RHVAC) CONTROL MODULE |
| U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | GO to Pinpoint Test Z |
| U0164:00 | Lost Communication With HVAC Control Module: No Sub Type Information | GO to Pinpoint Test AA |
| U0422:68 | Invalid Data Received From Body Control Module: Event Information | GO to Pinpoint Test Z |
| U3000:41 | Control Module: General Checksum Failure | CLEAR the Diagnostic Trouble Codes (DTCs). WAIT at least 10 seconds. REPEAT the self-test. If DTC U3000:41 is retrieved again, INSTALL a new RHVAC Control Module. REFER to REAR HEATING, VENTILATION AND AIR CONDITIONING (RHVAC) CONTROL MODULE |
| U3000:42 | Control Module: General Memory Failure | CLEAR the Diagnostic Trouble Codes (DTCs). WAIT at least 10 seconds. REPEAT the self-test. If DTC U3000:42 is retrieved again, INSTALL a new RHVAC Control Module. REFER to REAR HEATING, VENTILATION AND AIR CONDITIONING (RHVAC) CONTROL MODULE |
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | GO to Pinpoint Test AB |
| U3003:17 | Battery Voltage: Circuit Voltage Above Threshold | GO to Pinpoint Test AC |
RENDER: 1.0x
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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.