Cause of error code E44

Phase error

Solution for error code E44

1. Measure incomming power with volt meter. Is terminal 120 Vac (L) approximately 120 Vac? Is 120 Vac (N) approximately 0 Vac? 
Yes: -> 2.
No: Correct power supply to boiler.

2. Verify order of pins on J2. 4 pins order should be: empty, black ( or red), white, green. Measurevolts on pins of black wire and white wire. Is wiring/pins in right order? Does black/white wire pin have 0 Vac? 
Yes: Replace control module.
No: Replace wire harness.