Ideal Heating · Logic Code Combi ESP1
dUDiverter valve held in mid-position for service
This code applies to Logic Code Combi ESP1 26, Logic Code Combi ESP1 33, Logic Code Combi ESP1 38. Fault codes narrow down the likely problem, but they do not replace a model-specific diagnosis.
What you can safely check
- This is normally a status or temporary message rather than a repair instruction.
- Wait for the boiler to complete the operation and consult the user manual if it persists.
How an engineer may fix it
Confirm the operating state and investigate only if it does not clear as described in the appliance instructions.
Manufacturer source: Ideal Heating — Logic Code Combi ESP1 Installation & Servicing (UIN 222364 A04). Checked 15 August 2026. The appliance manual and an engineer’s on-site diagnosis take precedence. Never remove the boiler case yourself.