Ok, this advice is going to sound weird, but we have the same problem from time to time with our Kreepy... so if you've checked out all of the things poolman mentioned, just try tweaking these things:
1) Even though your suction is good, if you have cartridge filters, they may need cleaning. I noticed NO decrease in our intake or flow, but we cleaned the filters (and they were really dirty!) and Kreepy worked great!
2) Have you cleaned out the pump strainer/basket (the one next to the pump)? When I was a new pool owner, I would frequently forget about this basket. I would clean out the skimmer, but totally skip this. Then I noticed I was losing suction and went to check it out and sure enough, the pump basket was clogged! I was still getting *decent* flow, but it was enough to keep Kreepy from working.
3) Try adjusting your water intake from completely on SKIMMER to partly on MAIN DRAIN/mostly SKIMMER.
That may not be clear.Um, what I'm trying to say is: I was told to turn my water intake valve completely to SKIMMER when using the Kreepy Krauly. I did that and it just sat there. I started fooling with the valve -- moved it to half-skimmer/half-main drain: still nothing. Then I turned it so that it was pulling MOSTLY (about 90%) from the skimmer and about 10% fromt he main drain. Kreepy started right up!
Sometimes just changing the intake flow back and forth a few times gets him going...
4) Finally, try pressing (gently!) on Kreepy's head so that it gets FULL CONTACT with the pool floor. I don't know why this works sometimes, but it does! It's like it just can't get *started*. Once it gets going, it works great all day...
I can't explain WHY these things work sometimes and at other times, don't, but we have ALWAYS been able to eventually get Kreepy started up by adjusting one (or all) of these things. Most of the time, he starts up, no problem; but he is definitely one cantankerous piece of equipment!
HTH,
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