Recently, I redid one wheel on my two wheel wheelbarrow. Electoylisis rust removal, power wash, phosphoric acid treatment, primer, and finish coat, then new tube and tire. First tube was defective, so I removed it. When I broke tire loose from rim, there was water inside tire, which had not been in the rain. Take tire completely off rim, dry it out and let sit in sun for a day. Install tire with another new tube, and today find that some kind of liquid was seeping from around valve stem area. Haven't slightest clue as to what it is, or where it's coming from. Yesterday, went to replace control board on heat pump. Installed new board, and as soon as power was applied, it blew the fuse. Fault chart said short in low voltage wiring. Checked for shorts, and found none. Installed fuse from old board, and same results. Ordered a box of fifty 3 amp fuses from Amazon, and this afternoon reinstalled new board, with new fuse, except for low voltage wiring. Turned power on, and fuse didn't blow. Plugged in low voltage wiring, and unit runs fine. Nothing else was changed. Strange happenings!