Hi. I have a 220v heater/pump. The motor is getting power but won't do anything. I brought the old motor in and got a new one. It is doing the same thing. There is power from the heater box to the motor harness, 120volts in both of the red and black wires. What could be the problem?

The light is working fine as well as the blower. When I kick the power on i get a slight buzz from the heater box but I get no low or high pump. Its as if the pump isn't doing anything at all. But I know it has power.

Any suggestions? Thank-you

That's not how to measure 220v.

That may also mean you have a single 120v leg in both the wires.

Measure across the red and black for 220v

EDIT: Thanks Dr. Spa!

Read Dr. Spa's post too- if that's a two speed pump, red and black should never read 220v.
If you have 4 wires, red would be one speed, black the other, and white the "common" hot., so you would get 220v between the white and whichever speed is energized

It this by chance a 2 speed pump?

What voltage is it rated for?

it is a 2 speed pump and it is 220volts

I measured across the red and black and have no power. What is the cause for this?

Thanks

Because you're testing for voltage from two spots on the same "hot" source.

As Dr. Spa pointed out, this is a two speed pump, you should never get 220v between the black and the red.

Imagine a single hot line. If you take your two meter leads and place them on two spots on the same hot wire, you'll get zero. If you measure (one at a time) from those two points to ground, you'll see 120volts at each point. This is why you can't measure for 220v by seeing if there's 120 volts at each leg.

Your spa uses two separate 120 lines for 220 power. It uses one of the 220v lines for a (120 volt)common, and the other (120 volt) to energize either high or low speed.


You should get 220v between a black OR red, and the white common wire. Your pump should have 4 wires. A high speed wire, a low speed wire, a common (always hot) wire, and a ground. .

Does this make sense?

Yes. That does make sense. What I tested is the red and white. I got no power. I then tested the black and white. Still no power.

Yes there are 4 wires on the control box outlet red/black/white/green. Why am I not getting 220volts between one of the hots and the neutral? Could the fuses in the control box or relays need to be replaced?

Unplug the pump, and measure voltage from white (pump common, NOT neutral wire) to ground at the control box.

I got 120volts.

Keeping the pump unplugged, energize high speed, and measure for voltage (on the control box side of the pump wiring) between red and ground, black and ground, red and white, and black and white.

Please post results, and some pic's to be sure we're on the same page