Ideal · Logic Code Combi ESP1
dU boiler fault code
Logic Code Combi ESP1 — models 26 / 33 / 38
What dU means
dU indicates the diverter valve is in mid-position for service.
Gas Safe engineer: If the message remains or returns after the listed control steps, contact Ideal or arrange a Gas Safe registered engineer.
If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.
Safe check
Rotate all knobs fully clockwise. Turn the boiler power off and on once, then press Restart once. If the message remains or returns, contact Ideal or arrange a Gas Safe registered engineer.
When to contact an engineer
If the message remains or returns after the listed control steps, contact Ideal or arrange a Gas Safe registered engineer.
Source and provenance
- Ideal Logic Code Combi ESP1 26/33/38 Installation & Servicing · UIN 222364 A04 · §4.1 Fault Finding Chart Main Menu, printed p. 56
installation and servicing instructions
10/2023 · UIN 222364 A04
- Logic Code Combi ESP1 User Guide · UIN 222364 A04 · §8 Fault Codes, printed p. 8
user guide
10/2023 · UIN 222364 A04