On 07/01/2017 07:13 AM, Uncle Monster wrote:
On Saturday, July 1, 2017 at 6:09:00 AM UTC-5, Sherlock.Homes wrote:
Seems to be 120vac from red to ground and 120vac from black to ground but no
voltage between red and black, which should be 240vac. Reading was taken at
the external dissconnect. What might cause this?

Thanks,
S

One leg is dead and you're reading voltage through the crankcase heater. make sure the disconnect is off before checking the voltage.

The central crankcase heater?