Bowl stuck in spin cycle when water sensor dirty

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What steps will reproduce the problem?
1. Start a wash cycle with a dirty water sensor.

What is the expected output? What do you see instead?
The unit should either error out/stop or proceed to the end of the cycle 
anyway.  Instead the unit gets stuck in a perpetual bowl spin state until you 
stop it manually.  To restore proper operations you have to remove the PU, 
clean the sensor, and then restore the PU.

What version of the product are you using? On what operating system?
I have the catgenie 120 with B04 firmware on the PIC16F1939.

Please provide any additional information below.
I think the simple solution would be to let the cycle continue even if no water 
was detected, either that or halt the unit with an error beep so the user knows 
there is a problem.

Original issue reported on code.google.com by DTA...@gmail.com on 24 May 2015 at 2:32

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I'd like to also add that I have a cat with bowel problems on stool softener so 
his poo is extra soft.  Because of this any scoop only cycles are not the best 
option as this leads to my water sensor becoming gummed up less than weekly.  I 
can beat this back to cleaning it only monthly if I do a full wash cycle every 
time.  The whole reason I flashed the cat genius was to either have reduced 
cleaning cycle times, or scoop only cycles as I have two older cats that would 
rather pee on my floor than wait for a full cleaning cycle to complete. 
Unfortunately if I'm away for the weekend or the spin cycle errors out when I'm 
just heading out for a 12 hour work day I fear I will damage my motor that 
spins the bowl by having it run all day or for a weekend.  I've noticed that 
after just a few hours of this running constantly my PU gets very warm.

Original comment by DTA...@gmail.com on 24 May 2015 at 4:56