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Bosch Error Code A0

What Does a Bosch Error Code A0 Signify?

The Bosch error code A0 is a common error code that can flash on your Bosch 4000S external and 4000S internal gas continuous flow hot water systems. If error code A0 is flashing on the digital monitor of your Bosch 4000S gas hot water heater’s temperature controller this indicates that there is something wrong with the cold and hot water temperature sensor.

How to Clear Bosch Fault Code A0

You can attempt to clear the Bosch fault code A0 by turning the unit off at the main power, turning on the hot water tap, and then turning the power back on. If error code A0 remains then you will need to call a qualified technician to investigate and repair or replace the temperature sensor.

For a quality plumbing service at an affordable price call the Bosch hot water heater repair experts from Jim’s Plumbing.

We can have a local plumber out to your location on the same day as your booking, or within the hour* in a gas or plumbing emergency. If you need an expert hot water plumber, Jim’s Plumbing has you covered.

Our fully qualified and highly skilled plumbers are available 24 hours a day, 7 days a week, including all public holidays, and can quickly rectify the Bosch hot water fault code A0 with our fuss-free and friendly plumbing service.

At Jim’s Plumbing, we put a focus on top quality service and plumbing. You can be assured that with Jim’s Plumbing you will always get:

  • 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 Repairs on Bosch Hot Water Systems

If you need urgent repairs on your Bosch hot water system due to an error code such as error code A0, Jim’s Plumbing can help on the financial side. Instead of slapping you with a big upfront bill in order to get your work done, Jim’s will offer you an incredible $0 deposit, interest free payment plan** so you can keep on top of your financial planning, while still getting your hot water system fixed.

Contact us today for more information, or book your plumber via our online booking form and we’ll call you back straight away – at no cost to you.


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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Thank you for my dishwasher

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.
Irene, VIC 5 stars rating

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!
Laura M., VIC 5 stars rating
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