New pump installed. Getting power, not working!

Ramon1990

Member
Jul 5, 2020
8
Missouri
Hello everyone, I just installed a aquasheild 230v 1.5hp pump. I’ve had the equipment for 10 years and I changed the capacitor on the old pump just a few months ago. Power was getting to the pump so I figured it was time to replace the old pump. My problem is that I’m still getting power to my new pump, when the filter switch is on, but it won’t run, I’ve checked everything I can think of and I’m honestly stumped. I replaced the switch relay, no change, triple checked the wiring and tested it all. Everything else works as it should and I’m not understanding what I could be missing. Any help would be great! Thank you in advance.
 

Attachments

JamesW

TFP Expert
Mar 2, 2011
20,300
Can you describe exactly how you are testing the voltage? Are you testing line-to-line? What is the exact voltage you are measuring? Can you show a picture of the wiring?
 
  • Like
Reactions: Ramon1990

Ramon1990

Member
Jul 5, 2020
8
Missouri
Using a multi meter, testing black and ground, then testing red and ground, no power until I turn the filter switch on, and I’m getting 120 from both the circuit breakers.
 

JamesW

TFP Expert
Mar 2, 2011
20,300
Check voltage from red to black.

Take the wires off of the pump and check red to ground and then black to ground.

Can you show the circuit breaker?

Note: When the wires are connected to the pump, the voltage from one wire can go through the motor windings and read on the other wire.

So, you can have one live wire and one dead wire, but you will still read 120 from the dead wire to ground. However, reading from line-to-line will show 0 volts.

Most likely, one wire is dead, which will show when you remove the wires from the terminals and test to ground.
 

JamesW

TFP Expert
Mar 2, 2011
20,300
Take the wires off of the pump and check red to ground and then black to ground.

Can you show the circuit breaker?

Note: When the wires are connected to the pump, the voltage from one wire can go through the motor windings and read on the other wire.

So, you can have one live wire and one dead wire, but you will still read 120 from the dead wire to ground. However, reading from line-to-line will show 0 volts.

Most likely, one wire is dead, which will show when you remove the wires from the terminals and test to ground.
 

JamesW

TFP Expert
Mar 2, 2011
20,300
If you measure between the red and black wires feeding the panel, are you getting 240 volts?

The thick red and black wires come from the main panel. You should read 240 measuring from red to black. If yes, the problem is with the pump circuit breaker. If no, the problem is with the circuit breaker in the main panel that feeds the subpanel.

Note that pump breakers should be GFCI breakers. So, if you replace the pump circuit breaker, use a gfci breaker.
 
Last edited:
  • Like
Reactions: Ramon1990