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Dunkirk PWX burner drop

mrbean8686
mrbean8686 Member Posts: 1
edited January 27 in Gas Heating
Hello folks got a Dunkirk PWX series water boiler that I have been experiencing burner drop according to my hvac tech. It usually fires twice or three times when the boiler has sat for more than an hour, when its hot or warm it usually fires in one try. I swapped out the ignition module with the same oem utec 1003-600A series the new unit has helped with re ignition with continuous retry, the old one didn't do that anymore. I have also replaced the spark assembly, I do have a one wire spark system. Any ideas whats causing this  are greatly appreciated thank you.

https://youtube.com/shorts/4KEuG0L5Q1Y?si=cjtyC3Vfj0D53K67

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