02trader Report post Posted October 12, 2022 The Aqua-Hot 450D in our Entegra was serviced less than 30 days ago by an Aqua-Hot service shop. It has been working fine until this AM...and the first morning in a while with low temps outside. I turned on the burner switch but the green light did not lite up...I heard a whining sound but the burner never ignited. I turned the switch back off for 30 seconds to allow the system to reset as described in the operation manual but not luck...the system whines a bit but the burner never ignites. We do get an occasional shot of heat from the electric element but not surprisingly, it doesn't last very long. I checked the expansion tank and the fluid level shows slightly below the "COLD" level...it is unclear to me whether this level would cause the burner to not ignite...the electric element heats the same fluid and it seems to be working though not very well. Since this system was just serviced, it seems unlikely, but not impossible, that the problem is related to a lack of service issue...ie. clogged filter(s), etc. Any thoughts? Thanks Jim Share this post Link to post Share on other sites
wildebill308 Report post Posted October 12, 2022 I don't know for shure but I would look on the unit for a "reset" button. I have a Oasis and when I had a problem with the burner not lighting I found and pushed the reset button. Bill Share this post Link to post Share on other sites
wayne77590 Report post Posted October 13, 2022 On this page Aqua Hot is a phone number and email for Rudy Leggett. Rudy is an Aqua Hot Guru. Give him a call and see if he can help you. Share this post Link to post Share on other sites
