Pentair freeze protection mode -- priming error


Bronze Supporter
Oct 13, 2016
Every time my freeze protection switches from spa to pool, the pump shuts down with the error "dry priming"

It only affects the pool circuit, spa runs fine the entire time without the same error.

However, if I press the reset button on the pump, it starts immediately drawing in water from the pool fine and starts running again.

I'm thinking the freeze protection mode isn't running at high enough RPMs to draw water in? When I manually reset the pump I use the highest RPM available which is 3500 but I don't know what the RPMs are in freeze protection mode.


Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
Laughlin, NV
Pool Size
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
The pumps should shut off while the valves are moving. You can set that in your ET programming.

You should also consider reducing the RPM for priming. Use 3000 rpm. Even 2500 rpm unless you have issues with priming.
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