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Putting different tyres on will alter the accuracy of the speedo and the recording of distance, so I wouldn't pay much attention the fuel economy. For example, a single revolution of the axle will remain constant regardless of the wheel size, but the revolution of the wheel versus distance traveled will vary depending on the diameter of the tyre fitted. If the new tyre was, say 10 cms circumference larger, then the car will travel 10cms further each full revolution (that is 100 meters every 1000 turns. If your speedo sensor is determined by the number of revolutions of the axle, then every 10,000 turns you will have travelled a kilometer more than with the old tyre size (less if the circumference is smaller). The figures you give convert to (UK) 25 mpg dropping to 20 mpg with the new tyres. Does seem poor consumption figures for a small car, but if a big engined truck that might be acceptable. All depends on how you drive it as well.
Configuration/Sets/BBB/LineAccess/LineAssignment: Assign the Line XXX to BBB as Appear and Ring or Ring Only (on intercom key)
Now the line rings on both sets
Administration/Capabilities/Sets/ AAA & BBB: -Change AAA\'s Forward No Answer Ring count to 4 rings -Change BBB\'s Forward No Answer Ring count to 3 rings -Obviously make sure the Forward No Answer is pointing to the DN of the voice mail system on both sets -Make sure Forward Busy is set to Non on both sets
Because the ring count is shorter on BBB all calls will dump in the mailbox of BBB
Do you feel like looking at the humidifier yourself? You can open the door on the unit, while the furnace is running-- The humidifier is usually installed in the return air duct, so there will be a sucking of air into the open door, when you open it.
There is usually a large wheel, with a wet pad wrapped around the circumference. This wheel rotates slowly, and picks up water from the sump-- does everything look and sound quiet as it runs? -- The float valve has to open and close, to c ontrol the leve of water in the sump-- (The pool of water the wheel runs the mat thru-- Possibly the valve shutting off, could make a plumbing BANG-- you could duplicate that, by lifting the float mechanism and stopping the water-- does that make the noise?
If you can reach and operate the Humidistat control from near the humidifier, do so a few time-- or Have someone cycle the humidistat a few times, and you listen for that sound-- Is it in the humidifier itself, or the duct work nearby?
It might be that the humidistat wheel scrapes against the side of the sheet metal duct work? -- Sounds travel a long ways in metal duct work!