Remeha fault code H03.00
Fault code H03.00 on a Remeha boiler (including Calenta Ace-Matic and Tzerra Ace-Matic) means: No identification data for the boiler safety device. Reset the appliance once. If the code comes back, a part is usually faulty. You can check the water pressure and settings yourself; leave work on gas-carrying parts to a certified gas engineer.
After a safety alert (gas, flue gas, combustion), reset no more than once and call in a certified gas engineer. If you smell gas, call your national gas emergency number or 112 immediately.
Cause
Fault code H03.00 on a Remeha boiler indicates: No identification data for the boiler safety device.
Applies to
Remeha Calenta Ace-Matic, Tzerra Ace-Matic, 24C CW3, 28C CW4, 30C CW4, 35C CW5, 35DS, 40C CW5, 40L CW6, Avanta Ace.
Fault code H03.00 on other Remeha series
The same code does not mean the same thing on every series. Check the rating plate to see which series you have:
- H.03.00 on Quinta Ace, 115, 160, 45, 65, 90: Parameter error Safety parameters level 2, 3, 4 are incorrect or missing.
- H.03.00 on Tzerra Ace, 24C CW3, 28C CW4, 39C CW5: Safety parameters level 2, 3, 4 not correct or missing.
Matching parts
Remeha parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.
Parts per Remeha-series: Tzerra Ace · Tzerra · Avanta Ace · Avanta · Calenta Ace · Calenta · Quinta Ace · Quinta.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
- Remeha siphon gasket bottom for Calenta Ace and Avanta Ace etc. € 2.94
- Remeha gasket for gas/air unit (Calenta Ace and Avanta Ace etc.) € 5.55
- Remeha NTC clip sensor for Calenta Ace and Avanta Ace etc. € 10.45
Fix it yourself or call an engineer?
Always consult the manual for your appliance and work safely. If in doubt or if the fault comes back, call in a qualified professional. A question about a part? Write to us at info@instalpunt.nl.
Frequently asked questions
What does Remeha boiler fault code H03.00 mean?
No identification data for the boiler safety device.
How do I fix fault code H03.00 on a Remeha boiler?
First check the cause described above. Then restart the appliance using the reset button. If the message comes back, a part usually needs replacing or the fault needs to be repaired by a qualified professional.
Which parts do I need for Remeha fault code H03.00?
That depends on the exact cause. In the Remeha parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code H03.00 myself?
You can reset the appliance and check things like the water pressure or settings yourself. Work on gas-carrying parts must be left to a certified gas engineer.
All Remeha boiler faults and codes at a glance →