I have a Laars Mascot FT 120, heat only. When I flip the power switch on, the fan will sometimes run slowly for a couple of seconds. This produces a fan error #61. I think is sometimes does it during normal operation, but not very often.
I have tried a different fan. I have tried a different main board. I have tried disconnecting both the air intake and the flue pipe. None of these has stopped it from creating new #61 errors.
(No PVC glue was used--apparently one possible problem is that PVC glue from new joints clogs the boiler.)
Does anyone have any ideas or experience with this problem?
The HTP UFT has the same board and boiler, so any experience from there might be helpful.
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