Have HVAC Questions? Ask an HVAC Expert for Answers
Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. First I’ll need some more info so I have a more complete picture of you situation.
I need the brand and model number of your boiler.
E02 is ignition failure, E04 is power lost after lock out (did you turn the power of to try a reset?). E37 is return temp sensor open circuit (bad sensor or bad connection to sensor)Here's a link to the control manualhttps://www.mediafire.com/?bl433brk5p4c3f4
Click on the green downlaod tab at the top right of the page.
Do you have more questions?