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Bosch Error Code C1

What Does the Bosch Error Code C1 Mean?

In order to see if your Bosch hot water system has an error code, check your temperature controller.  An advanced feature of the Bosch hot water temperature controllers is their ability to self-diagnose any fault that may occur within the hot water system. If there is any issue a fault code will flash on the remote controller’s monitor. This feature allows for a prompt repair as you can easily see where the problem lies by the fault code that is displayed.

One of the Bosch codes that may blink on the digital monitor is error code C1.

If the Bosch error code C1 is blinking on your digital monitor this indicates that there is insufficient airflow to allow the hot water heater to start up. Fault code C1 will display if your Bosch tankless hot water heater uses a combustion fan to allow for the combustion process to happen. With an error code C1 you will also have no hot water.

Bosh Fault Code C1 Repair

You can attempt to clear the Bosch fault code C1 yourself by turning a hot water tap fully and then turning it off. You can also try turning off the power of hot water system and then turning it on again. If error code C1 remains then you will need to call in a qualified plumbing professional.

For a fast resolution of the Bosch code C1 on your continuous flow hot water system, call the friendly Bosch hot water repair experts from Jim’s Plumbing. We will send a local plumber to your location on the same day of your booking, or within the hour* in a plumbing emergency – such as no hot water. Your hot water heater will be investigated to find the cause of the insufficient air intake and will be promptly repaired with minimal downtime to your day.

With Jim’s Plumbing you’ll always get top quality service and work, this includes:

  • 24/7 availability
  • Service within an hour*
  • Fully qualified and licensed plumbers
  • 12 month warranty
  • $0 deposit, interest free options**
  • Fully stocked van
  • $20 million public liability insurance
  • Over 15 years’ experience

Interest Free Bosch Hot Water Error Code Repairs

Jim’s Plumbing also offers $0 deposit, interest free payment plans** for your ease and flexibility. Apply for one with your plumber on site and have your repairs underway in no time, whilst not paying anything upfront.

For a local expert plumber who is available 24 hours a day, 7 days a week, including all public holidays call Jim’s Plumbing today.

1300 133 509


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Jayden was sent to fix my washing machine taps. He was polite and friendly, and explained what needed to be done. It was a bit more expensive than I expected, but from my call for service to the job being completed was only two hours. I would definitely recommend!
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