Pump Question

[TishTash]

Don't judge me too harshly, but I accidentally left the inlet valve closed overnight, while my (Hayward) pump engaged via timer. No explosions or floods, and (now that I've opened the valve) the pump's running well without any leaks (yet). But!:
a) how likely is there permanent internal damage?
b) would there have been some kind of failsafe trip that shut down the pump at some point?

Sorry if any of these are obvious questions, either to the positive or negative. Thanks for any insights, as always.

 

[borjis]

Motors can shut off when getting too hot.
I have seen photos of melted/deformed housings from when a motor got too hot running dry.

If it didn't go on for too long and everything seems ok, you might be.

 

[mknauss]

Did the water / pump basket get hot?

Only fail safe would be the thermal protection on the pumps motor.

 

[jblizzle]

a) how hot was the pump (not the motor) when you found it? If it is working, then not likely any damage.
b) Not usually. Some automation setups have a way to sense for flow and turn off the pump. Otherwise the motor will just shut off if it overheats (which would likely be well after damage to the pump itself would have occurred.

Keep an eye out for any water leaks around the pump and motor.

 

[TishTash]

There's an infrequent drip around a pipe NEAR the pump (past it), but that appears to be a leaky joint. The pump was/is cool, the housing seems intact and unaffected (at least outwardly), and maintains pretty propulsive flow w/usual PSI. My hope is it miraculously turned off not too far into running dry for whatever reason, before anything tragically drastic occurred. I just need to triple-check whenever I leave the pool that all valves are open, obviously. Thanks for the reassurances, all.