Remeha fault code H02.05
Fault code H02.05 on a Remeha heat pump (including Elga Ace and Eria Tower) means: CSU does not match CU type:. 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 H02.05 on a Remeha heat pump indicates: CSU does not match CU type:.
Fixing fault code H02.05: step by step
- Switch the appliance off at the mains for 30 seconds (unplug it), then switch it back on.
- Is it about communication with the thermostat? Then check the thermostat connection and wiring.
- Reset the appliance once. If the code comes straight back, do not keep resetting it.
- If the code comes back, the PCB or burner control unit is probably faulty. Have the appliance read out first to be sure.
Applies to
Remeha Elga Ace, Eria Tower, Eria Tower Ace R32, Eria Tower Ace S R32, Mercuria, Mercuria Ace R32, -.
Click a model for the parts list and exploded view of that appliance.
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 PCB holder 100-2 (10 pcs) € 29.90
- Remeha AF60 outdoor sensor without connector € 54.36
- Remeha PT1000 temperature sensor € 57.08
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 heat pump fault code H02.05 mean?
CSU does not match CU type:.
How do I fix fault code H02.05 on a Remeha heat pump?
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 H02.05?
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 H02.05 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 heat pump faults and codes at a glance →