So... it's that time of year... time to turn the heaters on
Moved earlier this year to a new (to us) place. Both the (attached) garage and (detached) shop have large 240v heater/fan units mounted near the ceiling. Each unit is on its own 30A breaker, two in the garage on the house 200A panel, and two in the shop on a separate 200A panel there.
That's the good news.
The bad news is, only one out of four heaters is currently working - and its in the garage, not my shop!
Checking at the outlets for the non-working heaters, I get 122v from one leg to the ground, and... about 10-13 vac from the other leg to ground. Leg to leg, I get ~108-110 vac. On the sole working unit, I get 122 on both legs, and 244 across the outlet.
Where it gets a little weird is that back at the breaker panel, I get 122 to ground off *both* legs, and 243 across them. So somewhere between the panel and the outlet, I'm losing one leg - on three out of the four circuits. One circuit, I could perhaps buy into 'bad wiring'. Three? Not so much.
The house isn't exactly new (1999), but it isn't that old either, and it's been pretty well maintained. Plus, what I can see of the outlets and wiring for the heaters looks professionally done.
A little bit of what I've read almost leads me to wonder if there is a switch somewhere on that one leg of each circuit, especially since the heaters *are* high up on the wall, pretty much at the ceiling level and you need a ladder to get to the controls. But if so, they're cunningly well hidden
Any ideas or suggestions? Something glaringly obvious that I'm missing here?