Rheem Error Code Reference — All 16 Codes
Complete Rheem error code cheat sheet. All 16 fault codes with plain-English explanations and direct links to fix guides.
Use this page when your Rheem furnace, air conditioner, heat pump, or mini split is flashing a fault. Start with the exact code, then open the fix guide to diagnose airflow, ignition, sensor, pressure switch, board, or communication problems before you order parts or book a service call.
Tip: search the exact brand, model, and code together, for example "Rheem error code 13" or "Rheem pressure switch fault".
| Error Code | What It Means | Often a cheap fix? | Guide |
|---|---|---|---|
| Best Furnace Igniter Replacement | Universal and Brand-Specific Picks | — | Fix → |
| Rheem Classic Series Furnace Error Codes | Complete Guide | — | Fix → |
| Rheem EcoNet A101 Error Code | Causes & Fix | — | Fix → |
| Rheem Furnace 5 Flashes Error Code | Flame Sensor Fault Fix | — | Fix → |
| Rheem Furnace Error Codes | All Flash Codes Explained | — | Fix → |
| Rheem Furnace Igniter Not Working | Causes & Fix | — | Fix → |
| Rheem Furnace Not Heating | Causes & Fix | — | Fix → |
| Rheem Performance Platinum PDN Tankless Error Codes | Complete Fix Guide | — | Fix → |
| Rheem RA13 Air Conditioner Error Codes | Fault Code Diagnostic Guide | — | Fix → |
| Rheem RA16 Heat Pump Error Codes | Flash Code Diagnostic Guide | — | Fix → |
| Rheem RGPS Furnace Error Codes | Flash Code Diagnostic Guide | — | Fix → |
| Rheem RPH Series Packaged Unit Error Codes: Complete Guide | Rheem RPH packaged heat pump error codes and fault diagnostics. Flash codes, fault descriptions, and step-by-step technician fixes. | — | Fix → |
| Rheem Split System Heat Pump Error Codes | RA14, RA15, RP15 Fault Guide | — | Fix → |
| Rheem Water Heater Blinking Light Codes | What Each Flash Means and How to Fix It | — | Fix → |
| Rheem Water Heater Error Codes | Complete Guide | — | Fix → |
| Rheem Water Heater Pilot & Burner Assembly Replacement Guide | Pilot won't stay lit, weak flame, burner won't ignite, or sooting? Replacing the Rheem pilot assembly or burner assembly fixes failed flame proving and gas delivery issues. | — | Fix → |