Symptom Chart
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty and 2019 Ford F-450 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
| Condition | Possible Sources | Actions |
|---|---|---|
| Loss of coolant | Refer to the Pinpoint Test | GO to Pinpoint Test A |
| The engine overheats. | Refer to the Pinpoint Test | GO to Pinpoint Test B |
| The engine does not reach normal operating temperature. | Refer to the Pinpoint Test | GO to Pinpoint Test C |
| The block heater does not operate correctly. | Block heater power cable Block heater |
CHECK continuity in all 3 power cable circuits. If any circuit measures more than 5 ohms, INSTALL a new power cable. CHECK the resistance of the block heater. If the resistance does not measure between 30 and 40 ohms, INSTALL a new block heater. REFER to: Block Heater . |
| Noisy mechanical fan operation | Fan clutch | CARRY OUT the Fan Clutch Test -- Minimum Speed Requirement . |