Geothermal flow pump electrical dilemma

[brendams]

I have a Water furnace geothermal system put in about 14 yrs ago. One of my 1/2 hp circulating pumps (240V, single speed) had to be replaced, so I ordered a new one, tested it on a 240VAC circuit (it works fine on it), but when I connect it to the flow center, it doesn't work. It gets 240VAC, but does not make the pump spin. Again, pump works fine when wired to a 240VAC line, but not to the line that runs from the geothermal unit which also delivers 240VAC. I did it multiple times (making sure it was lubed with water so I didn't burn it up).

Anyone have any ideas?

 

[Valveman]

240V is 240V no matter where you get it. Not the same power if it works on one and not the other. You give it 240V and it will run. You can check the amps to verify if it is running or not.