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Errors


Boiler type Helix VX-050

Error code E52

Cause:

Return water temperature sensor is open. No continuity.

Solution:

1. Is harness plugged into Return Temperature Sensor? Is harness plugged into Control Module J5?
Yes: -> 2
No: Insert harness

2.Check continuity of brown wires between Return Temperature Sensor and Control Module J5-4 and J5-12 Continuity?  
Yes: -> 3
No: Replace Wires

3. Measure return temperature sensor resistance with digital meter. Estimate sensor temperature. Does temperature fall within ranges shown on chart? 
Yes: Replace control module
No: Replace retun temperature sensor