kok328

He most likely has SO cord where the ground wire is insulated green.
This technically makes it a viable conductor and would be considered 10/3.

brand - do you have wiring diagram for the heater or some pics of the inside where the blower motor is?

brand_1525

I have 240 volts coming out of the outlet so there is enough power there. So I plugged in the heater and turned it on and tested the volts in the heater and that read 240 volts so something must be wrong with the heater that I bought

kok328

Did you buy this new or used?

BridgeMan

Take it back to Farm & Fleet, exchange it for a different one. I have a very similar unit (240 V, 3 prong, 35' of 10/3 wiring) that I bought off Craigslist for $20, and it throws heat like there's no tomorrow.