Hi,

I have a Spaform Grand Canyon which is about 6 years old and has been suffering a few problems over the last year including malfunctioning pump and heater. Having got these problems resolved everthing seemed fine until last week when I went out to check the chems and found that the water was cold, there was nothing in the display and none of the buttons did anything.

None of the trips had gone so I checked that the PCB was receiving power which it is. I tested the fuses on the board and they are fine too.

The unit housing the PCB is a Balboa badged as SF100 (which I think is a Spaform designation) but I think it's a M3 board.

The only other thing I noticed is that the little wheel on the pressure switch unit which you turn when you get a "FLO" message will not move.

Any ideas?

If the display is blank, and the pcb is getting power, check your transformer secondary winding (I think it's 2 or 4 yellow wires?) that plug into the pcb by a whitish molex connector. Use the A/C scale on the voltmeter and see if that has any power. If not, replace transformer.

Thanks for the advice so far. I replaced the transformer - or rather an engineer did and the spa worked for a while but then died again.

What happens is this:

If left switched off for a while and then switched back on then in the display I see a count down from 005 to 001 then the spa starts up normally. Shortly afterwards (usually a few minutes) the normal temperature reading is replaced by the count down sequence again and the spa switches off.

Any ideas?