I've modified my spare blower to work like the hardy one with a solenoid, going to install it this week and see what happens. How do I know if my cold return is in the wrong spot? I've got to remove the coil cover and reseal it, can I tell by looking in there? How difficult was it to remove the siding? I was thinking about pulling it off and cutting rigid pieces of 1-2" foam siding to fit between the framing. My blower runs constantly right now 30* during the day, 15* at night and my water temp won't get up past 160-170, I have it set for 180* on a real thermostat, not the shaver one. I have the Shaver 290* and use to heat my house/garage with a 100K BTU oil boiler with no problems, so I should have enough heat. I ordered my boiler in April and they built it in May (they were still pretty dead then). I'm starting to get tired of modifying this thing. Do you have more pics of yours disassembled?