Worcester Bosch · Greenstar CDi Compact ErP

D1 boiler fault code

Greenstar 28/32/36 CDi Compact ErP

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What D1 means

Return sensor error.

Gas Safe engineer: Note the code and contact a Gas Safe registered engineer for diagnosis.

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.

Renting? Report it to your landlord or housing provider first. They are responsible for gas safety and boiler repairs, and the repair should not cost you.

Safe check

Note the displayed code. Do not open or adjust the boiler or repeatedly reset it; contact a Gas Safe registered engineer.

When to contact an engineer

Note the code and contact a Gas Safe registered engineer for diagnosis.

Source and provenance

Greenstar CDi Compact ErP Installation & Service · 6 720 813 276 (2015/07) · §7.6 status/fault codes, printed pp. 63–64; Tables 33–34 locking/blocking codes, printed pp. 71–73
installation and service instructions
2015/07 · 6 720 813 276