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Author Topic: House Breaker trips - when both pump and heat contactors engage  (Read 3712 times)

jerzeb04

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I have an OLD hot tub (pre circuit board models) ... I've been able to maintain it for years.
However, I'm stumped. The house breaker (not the tub GFI) trips when the heater thermostat is turned up and turns on (while the pump is running).
I've disconnected all .. even the pump. When I manually depress the pump contactor/relay with the thermostat up ... "trip".

I've looked over all the wires and connections and I don't see corrosion or strange stuff. Just not sure what component could cause this.
Flow sensor is new and adjusted (seems to work fine) ... internal fuses are good.
I even turned the thermostat up, engaged the flow sensor (without the pump running) .. it DIDN'T trip the breaker.

I still need to check the heating element .. but, I'm doubting that's the issue.

Just looking for some thoughts ......

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Dr. Spa™ Ret.

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Re: House Breaker trips - when both pump and heat contactors engage
« Reply #1 on: July 26, 2015, 02:13:36 pm »
A bad heating element, AND a bad GFI.
If you can't sell it on eBay, it may not even qualify as landfill.

Retired (mostly) from the industry after 33 years...but still putzing around with a consumer information website, and trying to sell obsolete owners manuals

jerzeb04

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Re: House Breaker trips - when both pump and heat contactors engage
« Reply #2 on: July 26, 2015, 02:16:29 pm »
I'll check out the GFCI ... the heating element measured out at 10 ohms ....

Dr. Spa™ Ret.

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Re: House Breaker trips - when both pump and heat contactors engage
« Reply #3 on: July 26, 2015, 08:00:12 pm »
the heating element measured out at 10 ohms ....

That doesn't mean it's not shorting out.
If you can't sell it on eBay, it may not even qualify as landfill.

Retired (mostly) from the industry after 33 years...but still putzing around with a consumer information website, and trying to sell obsolete owners manuals

jerzeb04

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Re: House Breaker trips - when both pump and heat contactors engage
« Reply #4 on: August 01, 2015, 05:11:44 pm »
Yep, the GFCI is fine. I guess I'll get an element. Is it a possibly relay ? What are the odds ?
Only reason I'm asking .... I'll get both at the same time if it's a decent possibility.

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Re: House Breaker trips - when both pump and heat contactors engage
« Reply #4 on: August 01, 2015, 05:11:44 pm »

 

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