Hi, and don't laugh, but this is a true story about installing a CatEye Strada Wireless.
Well, I mounted it and went for a ride and it was great, so I came home and decided to actually finish the mounting. The final mounting would involve placing the wheel magnet, using the black zipties that came with the kit on the fork, and placing the display on the bar where I can move my hand easily to change display features.
After 5 or 6 attempts to get a reading (and I tried everything I could think of), the display unit would simply not pick up a signal. I would lift up the stem to get the front wheel off the garage floor, and spin the wheel, and nothing would happen, except that now and then, I would get a couple of seconds of activity. I bought and installed new batteries, re-installed the sensor on the fork, re-initialized the display unit about 3 times, and even read the manual!
Finally, I took the unit back to the LBS where I got it and got a new one, same brand and model, and brought it home on Saturday. Followed directions assiduously. Nothing.
On a complete whim/hunch, I rolled the bike about 8 feet away from the furnace adjacent to my bike service location (the ultra high-efficiency jobbie with all the techno fan and heating features) and Zowie!
Instant success.
Best guess is that the furnace creates an electromagnetic field around the fan motor and controls, and the field is strong enough to affect the wireless transmission when the bike is essentially leaning on the furnace.
Anyway, problem solved. Now waiting for the rain to stop . . .
Joe F