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Hot Spring Vanguard VV Burnt Control Board


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I just acquired a Hot Spring Vanguard VV 2005 Serial Number VV2G1993 from my cousin. Upon hooking it up at our house, we noticed that the main control board, not the heater board, is burnt. I'm looking to replace the control board (p/n 77087) but wondering how the board was burnt in the first place? Could it be a bad sensor or pump? I don't want to buy the $400 board, and burn it up again. 

Also, should I be replacing the heater board too?

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That's the low voltage power supply. It's a daughter board mounted to the main board.

I don't think you con buy that separate. An electronics repair guy might be able to rebuilt it. I doubt it's a bad sensor that took it out. Probably just had a component fail shorted, which would cause the damage you see.

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1 hour ago, cranbiz said:

That's the low voltage power supply. It's a daughter board mounted to the main board.

I don't think you con buy that separate. An electronics repair guy might be able to rebuilt it. I doubt it's a bad sensor that took it out. Probably just had a component fail shorted, which would cause the damage you see.

You're saying a component on the board shorted itself and caused the damage or something else?

Do I need to replace both the heater board and the main board or just the main board? 

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I don't know what it took. The charring on the low voltage power supply indicates a component shorted out. Did it take anything connected to it? I don't know. Maybe @RDspaguyor @CanadianSpaTechmight know better although our friend from the great white north is primarily a Gecko guy. 😜

The heater board is probably good, it doesn't look like a relay toasted. A new main board should certainly fix it.

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20 minutes ago, cranbiz said:

I don't know what it took. The charring on the low voltage power supply indicates a component shorted out. Did it take anything connected to it? I don't know. Maybe @RDspaguyor @CanadianSpaTechmight know better although our friend from the great white north is primarily a Gecko guy. 😜

The heater board is probably good, it doesn't look like a relay toasted. A new main board should certainly fix it.

Awesome thanks just ordered a new board! I will say this tub was running fine 2 months ago and I tend to think the charr may have been sometime in the past and unknown. 

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9 hours ago, Ashley C said:

tend to think the charr may have been sometime in the past and unknown. 

Nope, it's just as @cranbizsaid. 

I would suggest replacing the controller as well, as it could have been related since it is using the low voltage along with the board. Also, not all hot springs boards and controllers are compatible, so make sure you are getting the right one. They all look pretty much alike.

Damaged sensors would not cause this, but the sensors could be damaged by it, depending on what occurred.

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6 hours ago, RDspaguy said:

Nope, it's just as @cranbizsaid. 

I would suggest replacing the controller as well, as it could have been related since it is using the low voltage along with the board. Also, not all hot springs boards and controllers are compatible, so make sure you are getting the right one. They all look pretty much alike.

Damaged sensors would not cause this, but the sensors could be damaged by it, depending on what occurred.

Thanks, I purchased 77087 Main Circuit Board for 73223 IQ 2020, my serial number is VV2G1993. Based on part numbers and replacement part numbers I believe this is the correct one. But if anyone knows differently please let me know!

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