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Topic: Circuit Board/Heater issue

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Circuit Board/Heater issue

Hi all.

I have a 2005 marquis Epic hot tub. It has been an awesome hot tub. But it is a 18 year hot tub. Trouble free until about 3 years ago. Pump 1 replaced, display replaced, and had a leak around the waterfall area *(spent a lot of time fixing this, finally got it), which I fixed all of them. Replaced OZ many times (just recently too). So overall not too bad a shape for its age.

Recently started to trip the breaker. I figured out it was the heater was bad. The heater blew the circuit board as well (one of the copper posts (not both) burned the circuit board).

So I replaced the circuit board and the heater. I reused the copper connectors from heater to circuit board, one that blew the board did not look bad, I cleaned it up. I think this was my big mistake! After installed, all ran fine for a while. But then exact same thing happened. The heater blew the circuit board on the copper connector that I cleaned up. ug! Expensive mistake as the copper connectors are cheap!

I am trying to consider if i should just stop putting any money in this tub. I really don't want to buy a new Tub and we do use it in Colorado. 

If I decide to try again, and put NEW copper connectors, circuit board and heater, anything else I should check that could be wrong vs what I think was the problem (the previously burnt copper connector that probably was bad and created resistance after it got hot and burned the new circuit board)??

(FYI, the spa will run when the copper connectors are not connected, even after the circuit board blew. The old and new circuit board this happens).


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