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Question About Weil-McLain Boiler Ultra Series 2
E02 Error...

Intermittent E02 error which means, after 5 tries to fire it goes into Hard Lock Out. This happens on Low Fire and on High Fire. Tech support and contractor can't diagnose. All test look good.

Asked by Bob on 01/01/2009 5  Answers

ManualsOnline posted an answer 15 years, 11 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

Andrew posted an answer 15 years, 9 months ago

5 I am having the same problem with my Ultra2 155. It keeps going to E02. I have had my contractor and Weil-Mclain here and they have replaced almost all the parts of the boiler. Let me know you find anything out.
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Dimitrios posted an answer 15 years, 7 months ago

0 air adjustment
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Bob posted an answer 15 years, 7 months ago

0 Afer many tries, the one that seems to work the best was replacing thy mixing/cobustion pipe, at least that is what it looked like. A pipe with a special configuration. After that the error has come up twice in the last six months. It was resettable both times. We will see what happens this winter
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Mike posted an answer 14 years, 1 month ago

0 I am having the same problem with my Ultra2 155. It goes to E02 about once every 100 starts. Please let me know if you've found the root cause.
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