Unknown
1 flash green on Baxi EcoBlue 18 Heat ErP

Baxi EcoBlue 18 Heat ErP fault code 1 flash green

What the manual says

Manufacturer manual

Temperature protection: Maximum flow temperature exceeded, Flow temperature rise rate too high, Excessive difference between flow and return temperature

From this model's manual
Verified against the Baxi/Baxi Bm Baxi Ecoblue 12 15 18 21 24 Heat Erp Installation Se installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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All 12 fault codes on the EcoBlue 18 Heat ErP

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