Tunze ATO problem AND solution

[intarsiabox]

Nice catch! Thanks for sharing.

[ALang]

Nice to know. Every bit helps! Thanks Palmer!

[MKLKT]

FYI this is actually pretty common for float switches in general, they're really sensitive to EMF from other pumps/wires nearby too. It's also why you don't tack on a powerhead into the switch's cable without a relay as the energy draw can cause the float switch to fuse and thus fail.

[lastlight]

Nice detective work! I'll remember this one.