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Bosch Error Code E4

What Does the Bosch Error Code E4 Mean?

With your water temperature controller, you can conveniently self-diagnose any faults that occur within the unit. If a fault is detected the digital monitor of the controller will flash an error code. This error code pinpoints exactly what is wrong within the appliance, allowing for a fast repair. One of the Bosch hot water error codes that may be displayed is error code E4.

If the Bosch fault code E4 is flashing on the status monitor of your controller this indicates your backflow temperature sensor is over 309° F.

How to Clear the Error Code

To resolve the error code you will need to engage the services of a fully qualified technician. In this case, feel free to contact Jim’s Plumbing. We cover all metropolitan areas 24 hours a day, 7 days a week, including all public holidays.

To rectify the Bosch E4 error code, your attending Jim’s plumber will check the exhaust vent, measure the voltage and check the blades of your heater. Each step will be carried out until the cause of the temperature sensor fault is rectified.

Having your hot water heater serviced as per manufacturers’ instructions will greatly reduce the risk of faults occurring with the appliance, as well as keeping it operating an optimum efficiency. If you can’t remember the last time your hot water system was serviced then just ask your attending Jim’s plumber about our preventative maintenance services

Quality Assurance Guarantee

You can always be sure that with Jim’s you’re receiving quality, friendly service that guarantees:

  • 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

Clear your Bosch E4 error code on the same day as your booking when you call Jim’s Plumbing. If you have any questions or wish to book one of our plumbers, contact us.

1300 133 509


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Leak Fixed!

I had an issue with water leaking under the sink, had water dripping from a cold water flexi hose. Rang Jim's Plumbing and Cameron arrived within 20 minutes. He thoroughly investigated where the leak was coming from, was very friendly and explained what to do if there were any more issues. Very happy with the quick service provided.
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Trent installed my new dishwasher here in Bundoora. He did an excellent job and even started my new dishwasher so it is ready to use. He was polite, neat and tidy. Thank you.
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So quick!

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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