Pump Motor and Heater will not turn on

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Welcome to TFP.

Heater will not turn on until pump is running. Pressure switch in heater keeps it off.

Have you checked the pump CB?

You may have a bad relay in the Jandy panel.
 
Thanks for the reply ajw22.
When I turn the heater toggle switch to on, nothing appears in the display. So I assume no power is getting to heater as well.
Is it advisable to remove the load wires for the cleaner(which does get power) and replace them with the motor load wires to test the relay?
 
Using a voltmeter you can probe where you have voltage. At the input side of the relay and the output side. You don’t have to move wires around to figure it out.

You can also disconnect and cap off the power wires into the pump relay and then check if the relay is closing when turn on the pump.

Just be careful working around a panel with live circuits.

I believe the pump power relay is the connection in the upper left on my panel. But you need to look at your panel and figure out what relay is used for what and where it is plugged into. You may have some unused relays.

Existing Jandy RS8 Panel

Existing Jandy RS8 Panel

 
Last edited:
Thanks for the quick reply ajw22.
My panel is a JI8000. There are two relay boards that look like this:

100280

Since I am not getting any voltage to the pump motor and the cleaner and spa blower are working, I am inclined to replace the relay board. Does this sound reasonable?
 
I would do some testing to confirm the relay failed versus throwing parts at it.

Are all of your relays used?
 
I am not familar with your boards and how they are wired. Seeing pics of your actual panel would be helpful.
 

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You have a voltmeter?

You say you have an unused relay. Do you see where the relay control wire plugs into the board that determines which aux position a relay is controlled by?
 
kwemple said:
Yes, I do have a voltmeter.
Click to expand...

Set your VM to a setting over 240V AC. Touch the two line terminals with the VM probes for your pump relay. Confirm you have 240V there.

Touch the two load terminals with the pump off and you should have 0 volts. Then turn pump on. Check voltage at load terminals.

If you have voltage on the line screws and no voltage at the load screws with the pump on then you have a failed relay or board.

kwemple said:
In the lower board there are two terminals that are not being used. I don't think that means that one relay is being unused. I think I stated that in error.
Click to expand...

It looks like the last relay on the lower board controls a 120V device where only one line/load needs to be switched by the relay.

So you only have 4 relays in your system?
 
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