Rheem Continuous Flow Error Codes – Deep Dive into Error Code 11

If you own a Rheem Continuous Flow Hot Water System in Perth, you know how much you rely on consistent hot water. When Error Code 11 appears, it’s not just frustrating—it signals an ignition problem that needs attention. In this comprehensive guide, we’ll walk you through:

• What Error Code 11 actually means

• Common causes and symptoms

• Step-by-step troubleshooting you can do safely at home

• When to call Ember Plumbing & Gas for expert help

• Preventative maintenance to avoid future breakdowns

Let’s ensure your hot water runs smoothly, reliably, and safely.

What Is Rheem Error Code 11?

Error Code 11 on a Rheem Continuous Flow unit indicates a failure to ignite. In simpler terms, the system is not lighting the burner as it should. This “No Ignition” failure is one of the most common error codes homeowners will encounter, and it can be caused by various factors:

• A lack of gas supply ready for ignition

• A blockage in the venting or combustion airflow

• Faulty ignition components like the igniter or flame sensor

• Gas valve or solenoid failures

Why This Error Is So Common

Error Code 11 is the most frequently reported fault on Rheem Continuous Flow units—especially those servicing older systems with regular wear, dusty environments, or inconsistent maintenance. Because ignition relies on proper airflow, electrical function, and gas supply, there are multiple failure points—making 11 a “first responder” error code.

So let’s walk through the telltale signs and how to troubleshoot.

Common Causes & What to Watch For

Here’s what might be causing Error Code 11:

1. No Gas Supply or Closed Valve

You should hear a clunk from the gas valve opening when the heater starts. If you smell no gas or hear no start-up sounds, your isolation valve may be closed—or the solenoid valve may have failed.

2. Faulty Igniter

If you hear clicking but no flame appears, your igniter could be at fault. A dirty or failed igniter won’t spark—and that sparks this error.

3. Flame (Rod) Detection Failure

If the flame appears briefly then fades, it indicates your flame sensor (rod) isn’t detecting the flame properly. A clean flame rod is essential for sustained ignition.

4. Blocked Ventilation

Proper airflow is critical. Obstructions in vents can result in delayed combustion or complete ignition inhibition—tripping the error code.

5. Ignition Circuit Problems / Component Failures

Faulty wiring, worn igniter, or failing solenoid/gas control board issues can cause ignition failure and further escalate the error if not resolved.

DIY Troubleshooting Steps (With Caution)

If you’re confident and safe, here are some initial checks you can do:

1. Check gas supply – Ensure your gas valve is fully open and other gas appliances are functioning.

2. Power cycle the unit – Turn it off for 5 minutes and restart to reset the system.

3. Clean the flame rod & igniter – Use fine steel wool to gently clean any soot or debris.

4. Inspect vents – Make sure vent flues are free of nests, blockages, or debris.

5. Observe ignition sequence – Look, listen, and smell:

   • No gas sound/trickle → gas supply issue

   • Click, no flame → igniter fault

   • Brief flash then death → flame sensor fault

When to Call Ember Plumbing & Gas (Perth)

These tasks involve gas and ignition—unsafe for DIY unless you’re a licensed plumber. Contact Ember Plumbing & Gas if:

• The error returns after simple resets

• You suspect faulty ignition parts or gas flow issues

• Hot water doesn’t remain steady after intermittent ignition

• You need rapid, safe service to restore functionality

We specialize in Rheem systems and can quickly pinpoint and repair the issue—saving you time and ensuring full compliance.

Preventive Maintenance Tips

To reduce future Error Code 11 occurrences:

• Schedule annual or biennial servicing

• Clean burners, flame rods, and ventilation every service visit

• Ensure gas pressure is adequate and stable

• Keep surrounding areas free of plant debris or pests in venting

Quick Summary

• Error Code 11 = Ignition failure—system not lighting properly

• Common causes include gas supply issues, igniter or flame sensor faults, or blocked vents

• You can do basic checks, but gas appliance maintenance is best left to professionals

• Ember Plumbing & Gas offers fast, licensed repair and long-term solutions across Perth

If you’re seeing Error Code 11 on your Rheem Continuous Flow system, Ember Plumbing & Gas has your back. Call us today at 0477 777 301 for fast, reliable diagnosis and repair from Perth’s trusted hot water specialists.