What It Means
Water circuit or P4 jumper continuity open.
Rheem Furnace
Rheem Furnace Error Code 58
Troubleshooting guide for the Rheem Furnace system fault 58.
Possible Causes
- Loose P4 jumper connection at control.
- Damaged jumper wire or connector.
- Water-sensing circuit fault.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
New to this code? Click to see why this happens
Full Diagnosis
Water circuit open / P4 jumper continuity open.
All Recorded Causes
Compromised jumper wire or connector at the furnace control, loose P4 connection, wiring fault, or water-sensing/jumper circuit issue depending on model configuration.
Verify Before Replacing Parts
- Confirm the exact Rheem model family and furnaces context before acting on a generic code description.
- Start with line voltage, low voltage, and board output checks in sequence so the fault is isolated cleanly — the data plate flags compromised jumper wire or connector at the furnace control, loose P4 connection, wiring f….
- Inspect connectors, relay outputs, and any recently replaced electrical parts for mismatch or loose fit, and verify the next candidate on the list.
- After the correction, run the system long enough to confirm the furnaces fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Rheem Furnace diagnostics step-by-step — so you confirm the cause before swapping parts.
