I have a simple 230 volt spa about 12 years old. It was assembled by the builders/sellers and thus has no brand of itself. 2 speed motor, electric element heater, digital topside control and 2 air controls for high speed (jets) and light.
Trouble is, the digital control, marked only with a 'G', seems to have gone nuts. It will work properly for perhaps a week, maybe 2 weeks and then without any warning the tub starts to cool off, although the digital readout still registers the last setting, it lies...
The fix has been for me to just pull the cutout plug and let it reboot for a few seconds and bingo, it's heating up for real again, good for another week or so.

Anyway I have concluded that the top control is pooched. All it has for identification is a letter 'G' on the upper left side. (if I'm wrong and it's repairable, I'm all ears)
Problem is, all the controllers I see have a 'standard' J&J plug and this one is J&J alright, but it isn't a dice boxcar layout of two rows of three pins, one on one end a flat one, it's got a pin in the center!



Is it some antique style plug? Is it replaceable or do I need to wire in a new female for a replacement control?
Thanks for any help.