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Errors


Boiler type Helix VX-150

Error code E57

Cause:

Flue temperature sensor is open. No continuity.

Solution:

1. Is harness plugged into vent temperature sensor? Is harness plugged into control module J5? 
Yes: -> 2
No: Insert harness

2. Disconnect harness from vent temperature senor and control module J5. Continuity for each blue wire? 
Yes: -> 3
No: Replace wire

3. Measure resistance across vent temperature sensor terminal. Does resistance match estimate flue temperature? 
Yes: Replace control module
No: Replace vent temperature senor.