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Hello all, I have a Laars LT low nox pool heater (>2003 model) - heater won't work. Between myself and one pool serviceman troubleshooted the heater but still can't figure out what is wrong. Perhaps someone can help!? Here is the issue: We followed the following appropriate manual (see link)...

Hello everyone I've got a laars lt 400 pool heater that was working last season (am in nj and it is now spring... 4yr old son wants to go in pool but it's way too cold! Up to daddy to fix it ASAP) :) De-winterized everything this spring and all seems fine except when filter running and pool...