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Atlantic
Boiler
Data independently verified by Elite B2B Technicians
Diagnostic Complet

Error Code AL03 Atlantic

Symptom / Description

Problem with central heating temperature

Root Cause

The central heating (CH) sensor (probe) is faulty or has a bad connection.

Repair Instructions

UNLOCKED

Check the connection of the CH probe. If the connection is good, the probe will need to be tested and likely replaced.

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