Remeha fault code H00.81
Fault code H00.81 on a Remeha boiler (including Calenta Ace-Matic) means: Ambient temperature sensor missing. 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 H00.81 on a Remeha boiler indicates: Ambient temperature sensor missing.
Applies to
Remeha Calenta Ace-Matic, 30C CW4, 35DS, 40C CW5, 40L CW6, Tzerra Ace-Matic, 24C CW3, 28C CW4, 35C CW5.
Fault code H00.81 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.00.81 on Avanta Ace, 24C CW3, 28C CW4, 35C CW5: Thermostat disconnected.
- H.00.81 on Quinta Ace, 115, 160, 45, 65, 90: RoomTempMissing The room temperature sensor was expected but has not been detected.
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 NTC clip sensor for Calenta Ace and Avanta Ace etc. € 10.45
- Remeha double NTC clip sensor for Calenta Ace and Tzerra Ace € 14.37
- Remeha NTC sensor € 33.98
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 H00.81 mean?
Ambient temperature sensor missing.
How do I fix fault code H00.81 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 H00.81?
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 H00.81 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 →