Buderus fault code OU-
Fault code OU- on a Buderus boiler (including Logamax plus GB402-320 G20 and Logamax plus GB402-320 G25) means: Start of burner start-up programme. 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 OU- on a Buderus boiler indicates: Start of burner start-up programme.
Applies to
Buderus Logamax plus GB402-320 G20, Logamax plus GB402-320 G25, Logamax plus GB402-395 G20, Logamax plus GB402-395 G25, Logamax plus GB402-470 G20, Logamax plus GB402-470 G25, Logamax plus GB402-545 G20, Logamax plus GB402-545 G25, -.
Matching parts
Buderus parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.
This message does not point directly to one faulty part. If the code keeps coming back, view the Buderus parts:
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 Buderus boiler fault code OU- mean?
Start of burner start-up programme.
How do I fix fault code OU- on a Buderus 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 Buderus fault code OU-?
That depends on the exact cause. In the Buderus parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code OU- 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 Buderus boiler faults and codes at a glance →