Atlantic fault code A3
Fault code A3 on an Atlantic heat pump (including Atlantic Aurea 5) means: PCB. 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 A3 on an Atlantic heat pump indicates: PCB.
Applies to
Atlantic Atlantic Aurea 5, R32 Hybrid Add On.
Fault code A3 on other Atlantic series
The same code does not mean the same thing on every series. Check the rating plate to see which series you have:
- A3 on ODU Monoblock Atlantic 11, ODU Monoblock Atlantic 6, ODU Monoblock Atlantic 8, 750732, 750733: Compressor temperature protection.
Matching parts
Atlantic parts are available from Instalpunt; shipping to EU countries from €17.95 (€24.95 for more distant countries), usually 3–5 working days.
For fault code A3, the part involved is usually in the category: PCB.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
- Atlantic sensor plate heat exchanger (cooling mode) € 15.68
- Atlantic outdoor temperature sensor € 17.65
- Atlantic temperature sensor (discharge temp.) € 28.75
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 Atlantic heat pump fault code A3 mean?
PCB.
How do I fix fault code A3 on an Atlantic 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 Atlantic fault code A3?
That depends on the exact cause. In the Atlantic parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code A3 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 Atlantic heat pump faults and codes at a glance →