Remeha fault code E11
Fault code E11 on a Remeha boiler (including Calenta and Calora) means: Too large a difference between flow and return temperature. 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 E11 on a Remeha boiler indicates: Too large a difference between flow and return temperature.
Fixing fault code E11: step by step
- Reset the appliance once; a one-off measuring error will then clear.
- Where you can reach it without opening the sealed combustion section, check that the sensor plug is seated firmly and the wiring is undamaged.
- If the code comes back, the sensor or its wiring is usually faulty (short or open circuit). Sensors in the sealed combustion section should be replaced by a qualified heating engineer.
Applies to
Remeha Calenta, Calora, 25L CW6, 35S, Calora Tower Gas 35S NL, Tzerra, 39 kW Combi, M 24c CW3, M 28c CW4, Calora Tower, Gas, 210 V2 80/120/160/200 kW, 220 SHL.
Fault code E11 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:
- E11 on Avanta, CW4: Air box temperature too high.
- E11 on Gas, Quinta, 115 PRO, 90 PRO, Gas 210 Eco Pro 115, Gas 210 Eco Pro 80: Too large a difference between heat exchanger and return temperature.
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 seal for Calenta and Calenta Ace € 15.63
- Remeha protective cap test point flue, set of 5 pcs € 35.34
- Remeha pressure sensor for Calenta and Calenta Ace etc. € 39.41
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 E11 mean?
Too large a difference between flow and return temperature.
How do I fix fault code E11 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 E11?
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 E11 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 →