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Bosch Error Code 11

Bosch Hot Water Heater Flashing Error Code 11?

Bosch is one of the world leaders when it comes to gas hot water heaters. The Bosch gas hot water heater is durable, reliable and built to last but, like any appliance, faults can happen from time to time. Thankfully, if you have a Bosch hot water temperature controller installed with your hot water system you can use the self-diagnostic code feature to quickly see what is causing the fault.

When a fault occurs a Bosch hot water error code will blink on the status monitor of the water temperature remote controller.

If you have one of the following gas hot water heaters:

  • Bosch Electronic Highflow 17e, 21e, 26e
  • Bosch Highflow Condensing C21 or C26

One of the fault codes that you may come across is an error code 11.

What Does Bosch Hot Water Error Code 11 Indicate?

The Bosch gas hot water fault code 11 signifies that there is a fault with the unit’s ignition. In this instance, your Bosch hot water heater will not operate and won’t produce hot water until the fault code 11 has been investigated and resolved.

Fix Bosch Error Code 11

There are certain steps that you can take to try to rectify a Bosch hot water error code 11 yourself, prior to calling in a qualified plumber. Check that the gas valve is open and that your gas supply is sufficient. You can check your gas supply by lighting your gas stove. If the stove does not light, or the flame seems weak, then this is an indicator that there is a problem with the supply.

If everything is working in relation to your gas supply, the next step you can try is to press the on/off button on your Bosch water temperature controller to off. Then turn on a hot water tap, press the on button on the controller again and if the Bosch code 11 does not return then the problem has been fixed.

If the Bosch error code 11 remains after taking the above steps, or you have determined that there is a problem in relation to your gas supply, your next step is to call a fully qualified Jim’s Plumbing technician to investigate and resolve the fault.

24/7 Bosch Hot Water Expert

For a Bosch hot water heater specialist, you can’t go past Jim’s Plumbing. If you have no hot water from your Bosch gas hot water heater then contact Jim’s Plumbing for a prompt and reliable hot water heater repair. Our skilled plumbers are all highly trained in rectifying all Bosch hot water heater error codes, including fault code 11, or any other problems that you may encounter with your hot water system.

It doesn’t matter to us what time of the day or night that you need a plumber, or what day of the year. We have a local plumber available near you 24 hours a day, 7 days a week, including all public holidays. We provide a same day service or can be at your location within the hour* in a gas or plumbing emergency.

We also offer $0 deposit, interest free terms** on our jobs, no matter how big or small the job. Enquire with your plumber when they arrive to get signed up so that you don’t have to pay anything upfront.

For a reliable, affordable and trustworthy plumber call Jim’s Plumbing 24/7.

1300 133 509


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