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Common Rheem fault codes with what each means, the likely cause, and what CANRO Heating & Cooling does to fix them. Servicing Rheem systems across Metro Vancouver since 1999.
Rheem Prestige R98V, Classic Plus, RP21 heat pump, ProTerra hybrid water heater, and RTGH tankless display fault codes via LED blink patterns or EcoNet app notifications.
Important: One reset attempt is generally safe for transient faults. If the same code returns within minutes, stop resetting — the lockout exists to protect the heat exchanger, ignition system, and gas-valve safety circuit. Note the exact code and call CANRO at (604) 359-1081. We carry common Rheem parts in every truck — most code-triggered faults are resolved in a single visit.
What it means: OK.
Common causes: None.
What to do: None.
Reset guidance: n/a
What it means: Control board error.
Common causes: Failed control board.
What to do: Service.
Reset guidance: no
What it means: Combustion air APS did not close.
Common causes: Vent obstruction, failed APS, ice in vent.
What to do: Inspect vent; call.
Reset guidance: no
What it means: Stuck-closed APS.
Common causes: Failed APS.
What to do: Replacement.
Reset guidance: no
What it means: Limit switch tripped.
Common causes: Low airflow, dirty filter.
What to do: Replace filter; service.
Reset guidance: one reset OK
What it means: Gas valve issue.
Common causes: Failed gas valve, flame rod.
What to do: Call.
Reset guidance: no
What it means: Burner failed to light.
Common causes: Flame sensor, ignitor, gas.
What to do: Clean / service.
Reset guidance: one reset OK
What it means: Inducer fan speed fault.
Common causes: Failed inducer.
What to do: Service.
Reset guidance: no
What it means: Mains low.
Common causes: Brownout, wiring.
What to do: Electrician.
Reset guidance: one reset OK
What it means: Flame extinguished.
Common causes: Dirty flame sensor, gas, condensate.
What to do: Clean / service.
Reset guidance: one reset OK
What it means: Various — EcoNet shows specific code text.
Common causes: See app for description.
What to do: Service per code.
Reset guidance: varies
What it means: See Rinnai-style codes (similar architecture).
Common causes: Per code.
What to do: Service per code.
Reset guidance: varies
What it means: Compressor, condensate, sensor.
Common causes: Service.
What to do: one reset OK
Reset guidance: no
Note the exact code on your display, then call CANRO. Most Rheem faults are diagnosed and repaired on the first visit because we stock common Rheem service parts in every truck.
📞 Call (604) 359-1081 nowCANRO services Rheem full-line HVAC and water heating in every Metro Vancouver city — including same-day emergency response for no-heat, no-hot-water, and gas-leak situations. See our city-specific Rheem pages:
→ See the full Rheem lineup hub page with every model, specs, and install costs
This Rheem error code guide is maintained by the CANRO Heating & Cooling team based on 25+ years of Rheem install, service, and repair experience across Metro Vancouver. Codes and behaviour described match current model manuals. Last reviewed May 2026.
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