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Thread: No Heat...
05-06-2014, 08:27 PM #1
I have a 15 yr old custom built hot tub. It uses a PCB and heat element from hydra quip [9000 series] wired 240 volt. Less then a year ago the pcb failed so i replaced it...all good until a few weeks ago...no heat.
So far, i have checked all the fuses, main breaker, no error codes.
With a voltmeter across the heat element terminals i dont get 240 volts. If I measure one terminal and ground i do get 120 volt for each of them.
Continuity test shows closed circuit for the heater.
05-07-2014, 07:27 AM #2
Testing across both heater power terminals is the proper way to test a 240V heater. If you test one leg to ground will give you a false reading. So this tells us you aren't getting power to the heater. Does your topside panel have a light or indicator that comes on when the spa is heating? If so is that coming on? If it is then that means you are getting a call for heat and heater relay on board is not closing. If it is not coming on then no call for heat and something else is causing this. This can be a flow problem or sensor problem. You may want to try removing the filter and see if the heat light comes on when the pump is running. If the spa was recently drained and filled then maybe you have an air lock in the pump.
05-07-2014, 08:57 AM #3
Thanks, Mary. My topside panel is showing the heat indicator.
I also have a light on the control panel that is wired to the two terminal lugs for the heat element; it does not light.
I had a similar issue nearly a year ago where one of the heater relays was not closing--replaced the circuit board and all was well. I would be suprised if the PCB has already given up the ghost considering the first one lasted 14yrs.
I did drain it but used the boiler drain to bleed off any air prior to starting the pump after refilling. I will try it without the filter and may jump the terminals on the flow/pressure sensor.
05-07-2014, 09:14 AM #4
The fact that the heat light is on means you are getting a call for heat. That means sensors and pressure switch are working and probably not a flow issue unfortunately. But the fact no power to board unfortunately means the relay may be stuck again. I don't know why that would happen in a year.
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