Remeha fault code E05
Fault code E05 on a Remeha boiler (including Calenta) means: Heat exchanger temperature too high: - Poor connection - Defective sensor - Sensor not connected or poorly connected - No flow. Reset the appliance once. If the code comes back, a part is usually faulty, often a temperature sensor. 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 E05 on a Remeha boiler indicates: Heat exchanger temperature too high: - Poor connection - Defective sensor - Sensor not connected or poorly connected - No flow.
Fixing fault code E05: step by step
- Read the water pressure on the display or gauge. With the system cold it should be between 1.5 and 2 bar.
- If it is lower, top up to 1.5–2 bar with the filling valve or filling loop, then close the valve again.
- Bleed the radiators with a radiator key, then check the pressure again and top up if needed.
- Reset the appliance once. If the code comes straight back, do not keep resetting it.
- Does the pressure drop again within a few days, or does the code come back? Then there is a leak somewhere (radiator, pipe, pressure relief valve or expansion vessel) or the pressure or flow sensor is faulty.
Applies to
Remeha Calenta, 25L CW6, 35S.
Fault code E05 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:
- E05 on Calora, Gas, Quinta, Tzerra, 115 PRO, 39 kW Combi: Heat exchanger temperature too high.
- E05 on Gas, Gas 210 Eco Pro 115, Gas 210 Eco Pro 80: Heat exchanger temperature above normal range (limit thermostat STB).
- E:05 on Calora Tower, Gas, 210 V2 80/120/160/200 kW, 220 SHL: Boiler temp too high.
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.
Based on the cause, these original Remeha parts fit (always check the type number of your appliance):
- Remeha pressure sensor for Calenta and Calenta Ace etc. € 39.41
- Remeha temperature sensor NTC (2 pcs) for Calenta and Quinta € 24.46
- Remeha temperature sensor HL € 24.46
Further reading on this cause
Other Remeha codes with the same cause
- 24 — Temperature sensor
- 31. — Flow temperature sensor fault
- 32. — Return temperature sensor fault
- 33. — Outdoor temperature sensor fault
- 34. — Temperature sensor fault
- 35 — Flue gas temperature sensor fault
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 E05 mean?
Heat exchanger temperature too high: - Poor connection - Defective sensor - Sensor not connected or poorly connected - No flow.
How do I fix fault code E05 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 E05?
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 E05 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 →