Bosch Hot Water Heater Fault or Error Code 99 Troubleshooting Guide
When equipped with the optional water temperature controllers, your Bosch Highflow or Highflow Condensing gas hot water heater will allow for an error code to display on the water controllers monitor in the event of a fault with the hot water system.
This fault self-diagnostic feature is extremely convenient as it quickly allows you to see exactly what the problem is with your Bosch hot water heater.
This provides for either a prompt DIY repair, or to know if you need a service call to rectify the issue.
One of the Bosch fault codes that may display on your Highflow or Highflow Condensing hot water heater is an error code 99.
What does a Bosch error code 99 mean?
If a Bosch fault code 99 is blinking on the status monitor of your hot water temperature controller this indicates that abnormal combustion is present and your hot water appliance will shut down as a safety precaution.
Bosch hot water fault code 99 troubleshooting
You can attempt to remove the Bosch error code 99 by turning the main power off and then back on. If the fault code 99 persists then we recommend taking the following steps;
- Turn off the hot water supply
- Turn off the hot water heaters power
- Turn off the gas and water supply valve
- Contact a fully qualified technician
You should never attempt to light the burner by hand on these units as they do not have a pilot light. Instead the unit is equipped with an automatic ignition device which lights the burner, when required, from a signal within the system.
When it comes to gas you need to vigilant and adhere to all safety instructions and precautions. If you are not a qualified gas fitter then leave it alone and call in an expert.
Jim’s Plumbing – your local and experienced Bosch hot water heater repairers
For a fast and reliable repair to rectify your Bosch hot water error code 99 call the expert plumbers from Jim’s Plumbing.
We cover all metropolitan areas of Adelaide, Melbourne, Perth, Sydney, Brisbane and Canberra and are available 24 hours a day, 7 days a week, including all public holidays.
When you book a local plumber from Jim’s Plumbing you can expect to receive a same day service (or within the hour* in a gas or plumbing emergency) with quality workmanship and customer satisfaction guaranteed.
As we are highly skilled in all aspects of Bosch hot water heaters, we understand what each Bosch hot water fault code indicates and how to fix it with minimal downtime or stress to you. We will clear and rectify your Bosch error code 99 and have your hot water running as normal before you know it.
For a trustworthy plumbing service at an affordable cost call in a local plumber from Jim’s, or use our handy online plumber booking form and we’ll call you back straight away, at no cost to you.
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No Interest Ever!* payment plan options available on hot water heater replacements to help ease any financial stress this burden may cause. If your bosch hot water heater is leaking, or you have no hot water, we can often have a plumber to you within the hour*.
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