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Alpha Fault Codes

Select a fault code to see its meaning, common causes and how to fix it.

• E01 The E01 code on an Alpha boiler means the appliance attempted to light the burner but was unable to establish or detect… Read more →
• E10 The E10 fault code on Alpha boilers signals that the system water pressure has fallen below the safe operating… Read more →
• E20 The Alpha E20 fault code has two reported meanings that vary by model. On most Alpha boilers it signals a flame… Read more →
• E25 The E25 code is Alpha's way of telling you that the boiler attempted to fire but could not confirm adequate water flow… Read more →
• E37 The Alpha E37 fault code indicates that the boiler has detected a low supply voltage condition and has shut itself down… Read more →